From patchwork Thu Sep 24 06:51:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796309 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3C65359D for ; Thu, 24 Sep 2020 06:52:12 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DDE1423772 for ; Thu, 24 Sep 2020 06:52:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="XUFcuzWy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DDE1423772 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C07208E0006; 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Thu, 24 Sep 2020 06:52:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=ZzPx71qgJF0jC0ikEBgBKShPtgyqvHrdfndjbCu7C3c=; b=XUFcuzWy60D3s8pxvmU8mmt6xP a5KtiaRQVXJifB651UMtAjWRxMib0YObi/FPgk2O8+1Br4UYxRrvOMiR/Y/1SB5fPjZ2pxQBNfgzb 4OXHKYc+ovmJJwNys7gjgm9A9vk0V+0ta6/+ECBHyxrlilHmxjzSkmnm+EQ4n/X7f1ir//eTIwmZD AVApt4a76FZYddf361u9kKYhGkmUfg26eH1hS0Z8/FZt6MNh8B4s4kiZo3TsVgN0rYbCpo/4cbVMn dY+2XXF2/Gfct2itXYVT6aKOVcRef77ztCUnX9W9i8Bwm1fLgEAeOgO74vo7lOEK99PoqR/6gA1z9 gU9HJDCQ==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6U-00019N-Al; Thu, 24 Sep 2020 06:51:42 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara , Johannes Thumshirn Subject: [PATCH 01/13] fs: remove the unused SB_I_MULTIROOT flag Date: Thu, 24 Sep 2020 08:51:28 +0200 Message-Id: <20200924065140.726436-2-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The last user of SB_I_MULTIROOT is disappeared with commit f2aedb713c28 ("NFS: Add fs_context support.") Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn --- fs/namei.c | 4 ++-- include/linux/fs.h | 1 - 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index e99e2a9da0f7de..f1eb8ccd2be958 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -568,8 +568,8 @@ static bool path_connected(struct vfsmount *mnt, struct dentry *dentry) { struct super_block *sb = mnt->mnt_sb; - /* Bind mounts and multi-root filesystems can have disconnected paths */ - if (!(sb->s_iflags & SB_I_MULTIROOT) && (mnt->mnt_root == sb->s_root)) + /* Bind mounts can have disconnected paths */ + if (mnt->mnt_root == sb->s_root) return true; return is_subdir(dentry, mnt->mnt_root); diff --git a/include/linux/fs.h b/include/linux/fs.h index 7519ae003a082c..fbd74df5ce5f34 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1385,7 +1385,6 @@ extern int send_sigurg(struct fown_struct *fown); #define SB_I_CGROUPWB 0x00000001 /* cgroup-aware writeback enabled */ #define SB_I_NOEXEC 0x00000002 /* Ignore executables on this fs */ #define SB_I_NODEV 0x00000004 /* Ignore devices on this fs */ -#define SB_I_MULTIROOT 0x00000008 /* Multiple roots to the dentry tree */ /* sb->s_iflags to limit user namespace mounts */ #define SB_I_USERNS_VISIBLE 0x00000010 /* fstype already mounted */ From patchwork Thu Sep 24 06:51:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796327 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7D1AF6CA for ; Thu, 24 Sep 2020 06:52:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 42FE023772 for ; Thu, 24 Sep 2020 06:52:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="GMHYT9gd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 42FE023772 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6ABB38E0005; Thu, 24 Sep 2020 02:52:07 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 5FB288E0008; 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See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Ever since the switch to blk-mq, a lower device not used for VM writeback will not be marked congested, so the check will never trigger. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn --- drivers/block/drbd/drbd_nl.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index 43c8ae4d9fca81..aaff5bde391506 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -3370,7 +3370,6 @@ static void device_to_statistics(struct device_statistics *s, if (get_ldev(device)) { struct drbd_md *md = &device->ldev->md; u64 *history_uuids = (u64 *)s->history_uuids; - struct request_queue *q; int n; spin_lock_irq(&md->uuid_lock); @@ -3384,11 +3383,6 @@ static void device_to_statistics(struct device_statistics *s, spin_unlock_irq(&md->uuid_lock); s->dev_disk_flags = md->flags; - q = bdev_get_queue(device->ldev->backing_bdev); - s->dev_lower_blocked = - bdi_congested(q->backing_dev_info, - (1 << WB_async_congested) | - (1 << WB_sync_congested)); put_ldev(device); } s->dev_size = drbd_get_capacity(device->this_bdev); 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Thu, 24 Sep 2020 06:52:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=+Llj/AmvV7mHR7T7gL/si/p73lK9Sq9nBxztkJ6FS3s=; b=tKir5D9mG/xQIv7GXHsh7cGgvx 3y0D7EY/xxMVq0o00qzUZIykqJjNgrs/YlOajox62YL/Iqe1EYGLVGzG+9JBHp7et96FOLh238Hhx YlzCTDKvfJ8izWf1tp3jcCDTQrNbzpfQEdmv1OoIS7ecJ3BdKSSx7cr8eRSMRiNDo76JU+baIa100 VFyFZ5UD7PdSLuwNzmfEXvOo1vGPKe0kwug7pVm0C48ljG+J0OOJy8PeZb/9gNVjhHzmwWcIBwwFF KlXPK6ixxl+tjcQ8r9oQC9V0kW8YWIzdUUgP4ynwziLtlB6+XId42Md/7Eg6wR86R1BKV04tFB9rK MW5QkZkQ==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6W-00019g-Dk; Thu, 24 Sep 2020 06:51:44 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara Subject: [PATCH 03/13] bcache: inherit the optimal I/O size Date: Thu, 24 Sep 2020 08:51:30 +0200 Message-Id: <20200924065140.726436-4-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Inherit the optimal I/O size setting just like the readahead window, as any reason to do larger I/O does not apply to just readahead. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Acked-by: Coly Li Reviewed-by: Martin K. Petersen --- drivers/md/bcache/super.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 1bbdc410ee3c51..48113005ed86ad 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1430,6 +1430,8 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size) dc->disk.disk->queue->backing_dev_info->ra_pages = max(dc->disk.disk->queue->backing_dev_info->ra_pages, q->backing_dev_info->ra_pages); + blk_queue_io_opt(dc->disk.disk->queue, + max(queue_io_opt(dc->disk.disk->queue), queue_io_opt(q))); atomic_set(&dc->io_errors, 0); dc->io_disable = false; From patchwork Thu Sep 24 06:51:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796303 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 482A1139F for ; 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Thu, 24 Sep 2020 06:52:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=g9xVnmRLNXPehcB4PdT7j+hjYku/j4udzyGtMh1GMwg=; b=L6rYs9SgfbS93bAxFavESPGoy0 /v4w1xHKzUlgbK7M4J4CfEklqmTuP2Z/b95hBWtxRTKXZM2PVUt7f4/gSSAFoLGN2git2oF5dLDwh TSLtJUhfBUrAXO9zkv+5p3NWTXtFLm3D8EMaWzzFlgrsHn61ZVCByA0wmc8fkLa3okgAXVOozzmiS 4rdy3q4Io0SIE7nJ6FE9igOCKmRGmE5Lv5ZKxomzwPp1dYsWWeKuiPxEpUh/iDHCQAft+lM3+BSxP MCvW3VsvvRaDMI9viLfFCmAnA8bzSX6j3m2/KNgIrWab8PfiT3CagUBPdUVzdoZvWuLIrBAc0ghF8 EWnVjA0w==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6X-00019u-Ek; Thu, 24 Sep 2020 06:51:47 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara Subject: [PATCH 04/13] aoe: set an optimal I/O size Date: Thu, 24 Sep 2020 08:51:31 +0200 Message-Id: <20200924065140.726436-5-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: aoe forces a larger readahead size, but any reason to do larger I/O is not limited to readahead. Also set the optimal I/O size, and remove the local constants in favor of just using SZ_2G. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Martin K. Petersen --- drivers/block/aoe/aoeblk.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c index 5ca7216e9e01f3..d8cfc233e64b93 100644 --- a/drivers/block/aoe/aoeblk.c +++ b/drivers/block/aoe/aoeblk.c @@ -347,7 +347,6 @@ aoeblk_gdalloc(void *vp) mempool_t *mp; struct request_queue *q; struct blk_mq_tag_set *set; - enum { KB = 1024, MB = KB * KB, READ_AHEAD = 2 * MB, }; ulong flags; int late = 0; int err; @@ -407,7 +406,8 @@ aoeblk_gdalloc(void *vp) WARN_ON(d->gd); WARN_ON(d->flags & DEVFL_UP); blk_queue_max_hw_sectors(q, BLK_DEF_MAX_SECTORS); - q->backing_dev_info->ra_pages = READ_AHEAD / PAGE_SIZE; + q->backing_dev_info->ra_pages = SZ_2M / PAGE_SIZE; + blk_queue_io_opt(q, SZ_2M); d->bufpool = mp; d->blkq = gd->queue = q; q->queuedata = d; From patchwork Thu Sep 24 06:51:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796333 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0AD616CA for ; 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Thu, 24 Sep 2020 06:52:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=m8GhkUhVC45RKNOvk9LAr0995X5gQH+nYESehLOLs8I=; b=Gt28Ha/7vWx1VDuu/1t+IWSVjj Mo61AV+Ao2fzcmr8WZ2o2Dmz4Fbja2w1R0k6K1Si4TNa/PDOaNaHDaW4tT25gH64xlPzsFS8MRkxL q3HxKfPGOOaBb/vGR/yCOgGiZ45ldJep35zVt+vB89WrbIPvpV+pVOSEgEMu7Su9QwCiExylWwmX9 Xb11PLrhMF6HLnsvWMIoOWBPmEMyq/CztekbecczSEjZ7gHklkIHKfXIVzKvbZAVr0iQb+SfqJW+r r5SCvFQ9o1z7evdPG7RJvZ/mqOh9sLeBaqSy0TzKSu6q7vfvF4BzN/IjHfOrLVvJDvyiROz4ur0NR b8vewvcw==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6a-0001AG-It; Thu, 24 Sep 2020 06:51:48 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara , David Sterba Subject: [PATCH 05/13] bdi: initialize ->ra_pages and ->io_pages in bdi_init Date: Thu, 24 Sep 2020 08:51:32 +0200 Message-Id: <20200924065140.726436-6-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Set up a readahead size by default, as very few users have a good reason to change it. This means code, ecryptfs, and orangefs now set up the values while they were previously missing it, while ubifs, mtd and vboxsf manually set it to 0 to avoid readahead. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Acked-by: David Sterba [btrfs] Acked-by: Richard Weinberger [ubifs, mtd] --- block/blk-core.c | 2 -- drivers/mtd/mtdcore.c | 2 ++ fs/9p/vfs_super.c | 6 ++++-- fs/afs/super.c | 1 - fs/btrfs/disk-io.c | 1 - fs/fuse/inode.c | 1 - fs/nfs/super.c | 9 +-------- fs/ubifs/super.c | 2 ++ fs/vboxsf/super.c | 2 ++ mm/backing-dev.c | 2 ++ 10 files changed, 13 insertions(+), 15 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index ca3f0f00c9435f..865d39e5be2b28 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -538,8 +538,6 @@ struct request_queue *blk_alloc_queue(int node_id) if (!q->stats) goto fail_stats; - q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES; - q->backing_dev_info->io_pages = VM_READAHEAD_PAGES; q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK; q->node = node_id; diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 7d930569a7dfb7..b5e5d3140f578e 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -2196,6 +2196,8 @@ static struct backing_dev_info * __init mtd_bdi_init(char *name) bdi = bdi_alloc(NUMA_NO_NODE); if (!bdi) return ERR_PTR(-ENOMEM); + bdi->ra_pages = 0; + bdi->io_pages = 0; /* * We put '-0' suffix to the name to get the same name format as we diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 74df32be4c6a52..e34fa20acf612e 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -80,8 +80,10 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, if (ret) return ret; - if (v9ses->cache) - sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; + if (!v9ses->cache) { + sb->s_bdi->ra_pages = 0; + sb->s_bdi->io_pages = 0; + } sb->s_flags |= SB_ACTIVE | SB_DIRSYNC; if (!v9ses->cache) diff --git a/fs/afs/super.c b/fs/afs/super.c index b552357b1d1379..3a40ee752c1e3f 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -456,7 +456,6 @@ static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx) ret = super_setup_bdi(sb); if (ret) return ret; - sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; /* allocate the root inode and dentry */ if (as->dyn_root) { diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index f6bba7eb1fa171..047934cea25efa 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3092,7 +3092,6 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device } sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; - sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super); sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE); diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index bba747520e9b08..17b00670fb539e 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -1049,7 +1049,6 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb) if (err) return err; - sb->s_bdi->ra_pages = VM_READAHEAD_PAGES; /* fuse does it's own writeback accounting */ sb->s_bdi->capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 7a70287f21a2c1..f943e37853fa25 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1200,13 +1200,6 @@ static void nfs_get_cache_cookie(struct super_block *sb, } #endif -static void nfs_set_readahead(struct backing_dev_info *bdi, - unsigned long iomax_pages) -{ - bdi->ra_pages = VM_READAHEAD_PAGES; - bdi->io_pages = iomax_pages; -} - int nfs_get_tree_common(struct fs_context *fc) { struct nfs_fs_context *ctx = nfs_fc2context(fc); @@ -1251,7 +1244,7 @@ int nfs_get_tree_common(struct fs_context *fc) MINOR(server->s_dev)); if (error) goto error_splat_super; - nfs_set_readahead(s->s_bdi, server->rpages); + s->s_bdi->io_pages = server->rpages; server->super = s; } diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index a2420c900275a8..fbddb2a1c03f5e 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -2177,6 +2177,8 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent) c->vi.vol_id); if (err) goto out_close; + sb->s_bdi->ra_pages = 0; + sb->s_bdi->io_pages = 0; sb->s_fs_info = c; sb->s_magic = UBIFS_SUPER_MAGIC; diff --git a/fs/vboxsf/super.c b/fs/vboxsf/super.c index 8fe03b4a0d2b03..8e3792177a8523 100644 --- a/fs/vboxsf/super.c +++ b/fs/vboxsf/super.c @@ -167,6 +167,8 @@ static int vboxsf_fill_super(struct super_block *sb, struct fs_context *fc) err = super_setup_bdi_name(sb, "vboxsf-%d", sbi->bdi_id); if (err) goto fail_free; + sb->s_bdi->ra_pages = 0; + sb->s_bdi->io_pages = 0; /* Turn source into a shfl_string and map the folder */ size = strlen(fc->source) + 1; diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 8e8b00627bb2d8..2dac3be6127127 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -746,6 +746,8 @@ struct backing_dev_info *bdi_alloc(int node_id) kfree(bdi); return NULL; } + bdi->ra_pages = VM_READAHEAD_PAGES; + bdi->io_pages = VM_READAHEAD_PAGES; return bdi; } EXPORT_SYMBOL(bdi_alloc); From patchwork Thu Sep 24 06:51:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796335 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 345386CA for ; Thu, 24 Sep 2020 06:52:27 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DDD0D23772 for ; Thu, 24 Sep 2020 06:52:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="L6xmSY3v" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DDD0D23772 Authentication-Results: mail.kernel.org; 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Thu, 24 Sep 2020 06:52:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=H8hk1GyqLuto/InuvfMfeFX2w3KpymgO3wY2UL3PIN8=; b=L6xmSY3vp6Lcglln6PGBprLB3R RjAxhsIpEdTFOG/XBsDo8f6bcBuKSZvVFyCxJ3c01dTixt5ELTxLP0k/iDi9vEZipLUcvf1kT/n86 5GpCKlSkjDhfT9gH2vjsiqaTOdX4c0R2Upj77gvJIPPi9RB2QUgaAMhss9sZkkOthWvdY+seYHhLB OR/VLpxTSS0TPEN5pDTQ7yIB4oDagi/Hz48Y/WsrPtYDCtu0IClRhNEDtxZae90fKWS9yrInJoPk6 TYq76s7Ix5T4TWbCNDOdntJtWhlgHHRhI9CCCdV74iYU012+0MpfGD+99BcL5LMaj2HLmHQwa3Zgt xfVjo8lg==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6c-0001AX-62; Thu, 24 Sep 2020 06:51:50 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Johannes Thumshirn Subject: [PATCH 06/13] md: update the optimal I/O size on reshape Date: Thu, 24 Sep 2020 08:51:33 +0200 Message-Id: <20200924065140.726436-7-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The raid5 and raid10 drivers currently update the read-ahead size, but not the optimal I/O size on reshape. To prepare for deriving the read-ahead size from the optimal I/O size make sure it is updated as well. Signed-off-by: Christoph Hellwig Acked-by: Song Liu Reviewed-by: Johannes Thumshirn Reviewed-by: Martin K. Petersen --- drivers/md/raid10.c | 22 ++++++++++++++-------- drivers/md/raid5.c | 10 ++++++++-- 2 files changed, 22 insertions(+), 10 deletions(-) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index e8fa327339171c..9956a04ac13bd6 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -3703,10 +3703,20 @@ static struct r10conf *setup_conf(struct mddev *mddev) return ERR_PTR(err); } +static void raid10_set_io_opt(struct r10conf *conf) +{ + int raid_disks = conf->geo.raid_disks; + + if (!(conf->geo.raid_disks % conf->geo.near_copies)) + raid_disks /= conf->geo.near_copies; + blk_queue_io_opt(conf->mddev->queue, (conf->mddev->chunk_sectors << 9) * + raid_disks); +} + static int raid10_run(struct mddev *mddev) { struct r10conf *conf; - int i, disk_idx, chunk_size; + int i, disk_idx; struct raid10_info *disk; struct md_rdev *rdev; sector_t size; @@ -3742,18 +3752,13 @@ static int raid10_run(struct mddev *mddev) mddev->thread = conf->thread; conf->thread = NULL; - chunk_size = mddev->chunk_sectors << 9; if (mddev->queue) { blk_queue_max_discard_sectors(mddev->queue, mddev->chunk_sectors); blk_queue_max_write_same_sectors(mddev->queue, 0); blk_queue_max_write_zeroes_sectors(mddev->queue, 0); - blk_queue_io_min(mddev->queue, chunk_size); - if (conf->geo.raid_disks % conf->geo.near_copies) - blk_queue_io_opt(mddev->queue, chunk_size * conf->geo.raid_disks); - else - blk_queue_io_opt(mddev->queue, chunk_size * - (conf->geo.raid_disks / conf->geo.near_copies)); + blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9); + raid10_set_io_opt(conf); } rdev_for_each(rdev, mddev) { @@ -4727,6 +4732,7 @@ static void end_reshape(struct r10conf *conf) stripe /= conf->geo.near_copies; if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe) conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe; + raid10_set_io_opt(conf); } conf->fullsync = 0; } diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 225380efd1e24f..9a7d1250894ef1 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -7232,6 +7232,12 @@ static int only_parity(int raid_disk, int algo, int raid_disks, int max_degraded return 0; } +static void raid5_set_io_opt(struct r5conf *conf) +{ + blk_queue_io_opt(conf->mddev->queue, (conf->chunk_sectors << 9) * + (conf->raid_disks - conf->max_degraded)); +} + static int raid5_run(struct mddev *mddev) { struct r5conf *conf; @@ -7521,8 +7527,7 @@ static int raid5_run(struct mddev *mddev) chunk_size = mddev->chunk_sectors << 9; blk_queue_io_min(mddev->queue, chunk_size); - blk_queue_io_opt(mddev->queue, chunk_size * - (conf->raid_disks - conf->max_degraded)); + raid5_set_io_opt(conf); mddev->queue->limits.raid_partial_stripes_expensive = 1; /* * We can only discard a whole stripe. It doesn't make sense to @@ -8115,6 +8120,7 @@ static void end_reshape(struct r5conf *conf) / PAGE_SIZE); if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe) conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe; + raid5_set_io_opt(conf); } } } From patchwork Thu Sep 24 06:51:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796305 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3C6FD6CA for ; Thu, 24 Sep 2020 06:52:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9F8FF2388A for ; Thu, 24 Sep 2020 06:52:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="sNzZpK12" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9F8FF2388A Authentication-Results: mail.kernel.org; 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Thu, 24 Sep 2020 06:52:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=W1E91e5jkwt+rFsVXdLBppeoFtDEC2cgaoA/yW+hNbo=; b=sNzZpK12ZTuznxvW1HjCQdBvv3 XLVWptgwadnpx8DA0HTYY0ieVDax4CExKngt+k2LVLgfMCfk+0d72P5pO7O6RTWbsIDF95s1bAhaN nba+MIkxr5wyOxE4K/9DDoZXqiIg8ZRDg9JZ/0uVZ23qXiItHaQ0bjT2wvBU06r5U48hwYWdcK+P+ fB8l57yBuj4ezlXG6IQD3GnS3WSW3+PL0rmCGp22yQQDD5slT8lCKdlXV24FZctJFZq2y4Vr0tTZx s0yWeCW1jDPE2Sx8oMBlt0/hT0AdB0A+buwYEzbUbBniqFg1DQE5dB1VgQrDiWzDq82F16cgejRjT X4g8uQew==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6d-0001Aj-LR; Thu, 24 Sep 2020 06:51:52 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Johannes Thumshirn Subject: [PATCH 07/13] block: lift setting the readahead size into the block layer Date: Thu, 24 Sep 2020 08:51:34 +0200 Message-Id: <20200924065140.726436-8-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Drivers shouldn't really mess with the readahead size, as that is a VM concept. Instead set it based on the optimal I/O size by lifting the algorithm from the md driver when registering the disk. Also set bdi->io_pages there as well by applying the same scheme based on max_sectors. To ensure the limits work well for stacking drivers a new helper is added to update the readahead limits from the block limits, which is also called from disk_stack_limits. Signed-off-by: Christoph Hellwig Acked-by: Coly Li Reviewed-by: Johannes Thumshirn Reviewed-by: Jan Kara Reviewed-by: Mike Snitzer Reviewed-by: Martin K. Petersen --- block/blk-settings.c | 18 ++++++++++++++++-- block/blk-sysfs.c | 2 ++ drivers/block/aoe/aoeblk.c | 1 - drivers/block/drbd/drbd_nl.c | 10 +--------- drivers/md/bcache/super.c | 3 --- drivers/md/dm-table.c | 3 +-- drivers/md/raid0.c | 16 ---------------- drivers/md/raid10.c | 24 +----------------------- drivers/md/raid5.c | 13 +------------ drivers/nvme/host/core.c | 1 + include/linux/blkdev.h | 1 + 11 files changed, 24 insertions(+), 68 deletions(-) diff --git a/block/blk-settings.c b/block/blk-settings.c index 5ea3de48afba22..4f6eb4bb17236a 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -372,6 +372,19 @@ void blk_queue_alignment_offset(struct request_queue *q, unsigned int offset) } EXPORT_SYMBOL(blk_queue_alignment_offset); +void blk_queue_update_readahead(struct request_queue *q) +{ + /* + * For read-ahead of large files to be effective, we need to read ahead + * at least twice the optimal I/O size. + */ + q->backing_dev_info->ra_pages = + max(queue_io_opt(q) * 2 / PAGE_SIZE, VM_READAHEAD_PAGES); + q->backing_dev_info->io_pages = + queue_max_sectors(q) >> (PAGE_SHIFT - 9); +} +EXPORT_SYMBOL_GPL(blk_queue_update_readahead); + /** * blk_limits_io_min - set minimum request size for a device * @limits: the queue limits @@ -450,6 +463,8 @@ EXPORT_SYMBOL(blk_limits_io_opt); void blk_queue_io_opt(struct request_queue *q, unsigned int opt) { blk_limits_io_opt(&q->limits, opt); + q->backing_dev_info->ra_pages = + max(queue_io_opt(q) * 2 / PAGE_SIZE, VM_READAHEAD_PAGES); } EXPORT_SYMBOL(blk_queue_io_opt); @@ -631,8 +646,7 @@ void disk_stack_limits(struct gendisk *disk, struct block_device *bdev, top, bottom); } - t->backing_dev_info->io_pages = - t->limits.max_sectors >> (PAGE_SHIFT - 9); + blk_queue_update_readahead(disk->queue); } EXPORT_SYMBOL(disk_stack_limits); diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 81722cdcf0cb21..869ed21a9edcab 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -854,6 +854,8 @@ int blk_register_queue(struct gendisk *disk) percpu_ref_switch_to_percpu(&q->q_usage_counter); } + blk_queue_update_readahead(q); + ret = blk_trace_init_sysfs(dev); if (ret) return ret; diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c index d8cfc233e64b93..c34e71b0c4a98c 100644 --- a/drivers/block/aoe/aoeblk.c +++ b/drivers/block/aoe/aoeblk.c @@ -406,7 +406,6 @@ aoeblk_gdalloc(void *vp) WARN_ON(d->gd); WARN_ON(d->flags & DEVFL_UP); blk_queue_max_hw_sectors(q, BLK_DEF_MAX_SECTORS); - q->backing_dev_info->ra_pages = SZ_2M / PAGE_SIZE; blk_queue_io_opt(q, SZ_2M); d->bufpool = mp; d->blkq = gd->queue = q; diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index aaff5bde391506..54a4930c04fe07 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -1362,15 +1362,7 @@ static void drbd_setup_queue_param(struct drbd_device *device, struct drbd_backi if (b) { blk_stack_limits(&q->limits, &b->limits, 0); - - if (q->backing_dev_info->ra_pages != - b->backing_dev_info->ra_pages) { - drbd_info(device, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n", - q->backing_dev_info->ra_pages, - b->backing_dev_info->ra_pages); - q->backing_dev_info->ra_pages = - b->backing_dev_info->ra_pages; - } + blk_queue_update_readahead(q); } fixup_discard_if_not_supported(q); fixup_write_zeroes(device, q); diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 48113005ed86ad..6bfa771673623e 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1427,9 +1427,6 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size) if (ret) return ret; - dc->disk.disk->queue->backing_dev_info->ra_pages = - max(dc->disk.disk->queue->backing_dev_info->ra_pages, - q->backing_dev_info->ra_pages); blk_queue_io_opt(dc->disk.disk->queue, max(queue_io_opt(dc->disk.disk->queue), queue_io_opt(q))); diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 5edc3079e7c199..ef2757012f59d5 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1925,8 +1925,7 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, } #endif - /* Allow reads to exceed readahead limits */ - q->backing_dev_info->io_pages = limits->max_sectors >> (PAGE_SHIFT - 9); + blk_queue_update_readahead(q); } unsigned int dm_table_get_num_targets(struct dm_table *t) diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index f54a449f97aa79..aa2d7279176880 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -410,22 +410,6 @@ static int raid0_run(struct mddev *mddev) mdname(mddev), (unsigned long long)mddev->array_sectors); - if (mddev->queue) { - /* calculate the max read-ahead size. - * For read-ahead of large files to be effective, we need to - * readahead at least twice a whole stripe. i.e. number of devices - * multiplied by chunk size times 2. - * If an individual device has an ra_pages greater than the - * chunk size, then we will not drive that device as hard as it - * wants. We consider this a configuration error: a larger - * chunksize should be used in that case. - */ - int stripe = mddev->raid_disks * - (mddev->chunk_sectors << 9) / PAGE_SIZE; - if (mddev->queue->backing_dev_info->ra_pages < 2* stripe) - mddev->queue->backing_dev_info->ra_pages = 2* stripe; - } - dump_zones(mddev); ret = md_integrity_register(mddev); diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 9956a04ac13bd6..5d1bdee313ec33 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -3873,19 +3873,6 @@ static int raid10_run(struct mddev *mddev) mddev->resync_max_sectors = size; set_bit(MD_FAILFAST_SUPPORTED, &mddev->flags); - if (mddev->queue) { - int stripe = conf->geo.raid_disks * - ((mddev->chunk_sectors << 9) / PAGE_SIZE); - - /* Calculate max read-ahead size. - * We need to readahead at least twice a whole stripe.... - * maybe... - */ - stripe /= conf->geo.near_copies; - if (mddev->queue->backing_dev_info->ra_pages < 2 * stripe) - mddev->queue->backing_dev_info->ra_pages = 2 * stripe; - } - if (md_integrity_register(mddev)) goto out_free_conf; @@ -4723,17 +4710,8 @@ static void end_reshape(struct r10conf *conf) conf->reshape_safe = MaxSector; spin_unlock_irq(&conf->device_lock); - /* read-ahead size must cover two whole stripes, which is - * 2 * (datadisks) * chunksize where 'n' is the number of raid devices - */ - if (conf->mddev->queue) { - int stripe = conf->geo.raid_disks * - ((conf->mddev->chunk_sectors << 9) / PAGE_SIZE); - stripe /= conf->geo.near_copies; - if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe) - conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe; + if (conf->mddev->queue) raid10_set_io_opt(conf); - } conf->fullsync = 0; } diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 9a7d1250894ef1..7ace1f76b14736 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -7522,8 +7522,6 @@ static int raid5_run(struct mddev *mddev) int data_disks = conf->previous_raid_disks - conf->max_degraded; int stripe = data_disks * ((mddev->chunk_sectors << 9) / PAGE_SIZE); - if (mddev->queue->backing_dev_info->ra_pages < 2 * stripe) - mddev->queue->backing_dev_info->ra_pages = 2 * stripe; chunk_size = mddev->chunk_sectors << 9; blk_queue_io_min(mddev->queue, chunk_size); @@ -8111,17 +8109,8 @@ static void end_reshape(struct r5conf *conf) spin_unlock_irq(&conf->device_lock); wake_up(&conf->wait_for_overlap); - /* read-ahead size must cover two whole stripes, which is - * 2 * (datadisks) * chunksize where 'n' is the number of raid devices - */ - if (conf->mddev->queue) { - int data_disks = conf->raid_disks - conf->max_degraded; - int stripe = data_disks * ((conf->chunk_sectors << 9) - / PAGE_SIZE); - if (conf->mddev->queue->backing_dev_info->ra_pages < 2 * stripe) - conf->mddev->queue->backing_dev_info->ra_pages = 2 * stripe; + if (conf->mddev->queue) raid5_set_io_opt(conf); - } } } diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index ea1fa41fbba8df..741c9bfa8e14c7 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2147,6 +2147,7 @@ static int __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id) nvme_update_disk_info(ns->head->disk, ns, id); blk_stack_limits(&ns->head->disk->queue->limits, &ns->queue->limits, 0); + blk_queue_update_readahead(ns->head->disk->queue); nvme_update_bdev_size(ns->head->disk); } #endif diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index be5ef6f4ba1905..282f5ca424f14a 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1140,6 +1140,7 @@ extern void blk_queue_max_zone_append_sectors(struct request_queue *q, extern void blk_queue_physical_block_size(struct request_queue *, unsigned int); extern void blk_queue_alignment_offset(struct request_queue *q, unsigned int alignment); +void blk_queue_update_readahead(struct request_queue *q); extern void blk_limits_io_min(struct queue_limits *limits, unsigned int min); extern void blk_queue_io_min(struct request_queue *q, unsigned int min); extern void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt); From patchwork Thu Sep 24 06:51:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796339 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 81B0759D for ; 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See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Just checking SB_I_CGROUPWB for cgroup writeback support is enough. Either the file system allocates its own bdi (e.g. btrfs), in which case it is known to support cgroup writeback, or the bdi comes from the block layer, which always supports cgroup writeback. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn --- block/blk-core.c | 1 - fs/btrfs/disk-io.c | 1 - include/linux/backing-dev.h | 8 +++----- 3 files changed, 3 insertions(+), 7 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 865d39e5be2b28..1cc4fa6bc7fe1f 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -538,7 +538,6 @@ struct request_queue *blk_alloc_queue(int node_id) if (!q->stats) goto fail_stats; - q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK; q->node = node_id; atomic_set(&q->nr_active_requests_shared_sbitmap, 0); diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 047934cea25efa..e24927bddd5829 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3091,7 +3091,6 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device goto fail_sb_buffer; } - sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super); sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE); diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 0b06b2d26c9aa3..52583b6f2ea05d 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -123,7 +123,6 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio); * BDI_CAP_NO_ACCT_WB: Don't automatically account writeback pages * BDI_CAP_STRICTLIMIT: Keep number of dirty pages below bdi threshold. * - * BDI_CAP_CGROUP_WRITEBACK: Supports cgroup-aware writeback. * BDI_CAP_SYNCHRONOUS_IO: Device is so fast that asynchronous IO would be * inefficient. */ @@ -233,9 +232,9 @@ int inode_congested(struct inode *inode, int cong_bits); * inode_cgwb_enabled - test whether cgroup writeback is enabled on an inode * @inode: inode of interest * - * cgroup writeback requires support from both the bdi and filesystem. - * Also, both memcg and iocg have to be on the default hierarchy. Test - * whether all conditions are met. + * Cgroup writeback requires support from the filesystem. Also, both memcg and + * iocg have to be on the default hierarchy. Test whether all conditions are + * met. * * Note that the test result may change dynamically on the same inode * depending on how memcg and iocg are configured. @@ -247,7 +246,6 @@ static inline bool inode_cgwb_enabled(struct inode *inode) return cgroup_subsys_on_dfl(memory_cgrp_subsys) && cgroup_subsys_on_dfl(io_cgrp_subsys) && bdi_cap_account_dirty(bdi) && - (bdi->capabilities & BDI_CAP_CGROUP_WRITEBACK) && (inode->i_sb->s_iflags & SB_I_CGROUPWB); } From patchwork Thu Sep 24 06:51:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796321 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DE064139F for ; Thu, 24 Sep 2020 06:52:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 706E223772 for ; Thu, 24 Sep 2020 06:52:17 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Thu, 24 Sep 2020 06:52:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=A8noZCsgs6zsTp2X13HIpzUHz8F1k2sgRVgeJsSkuGc=; b=wXgkIKJ4Xu/Tje2ewqRBexS3jx knzohwbuOKheQ5zsM/4Uq707acWkdfSpr30D7NpIPWsmKiVgAftfdHCv2/2Rr2ybiHZjFJcjgOQIa EuYApCxtAnmo3lQNth1BYyKgU2xheRSu/fupNId3ljT4XX6XlEfc4fJtVjWThxiR+HsGGq4L12k59 nn/Zl+LmT3T0RFd8vjL43NlJ8KhP4bxS46kihPm2LlJjZ/OxC7qfwOV0xR3sNC381nOy5R9FH7F1Q rAy9qULVGFaBcvSQZuqjeFCPU8SRG5cyCpOb/qEkrAsBMAt0CwRtEPLOpZMRQyPZV18Q36qImOy8Z gzaKzCxg==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6f-0001B1-QB; Thu, 24 Sep 2020 06:51:54 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara , Johannes Thumshirn Subject: [PATCH 09/13] bdi: remove BDI_CAP_SYNCHRONOUS_IO Date: Thu, 24 Sep 2020 08:51:36 +0200 Message-Id: <20200924065140.726436-10-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: BDI_CAP_SYNCHRONOUS_IO is only checked in the swap code, and used to decided if ->rw_page can be used on a block device. Just check up for the method instead. The only complication is that zram needs a second set of block_device_operations as it can switch between modes that actually support ->rw_page and those who don't. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn --- drivers/block/brd.c | 1 - drivers/block/zram/zram_drv.c | 19 +++++++++++++------ drivers/nvdimm/btt.c | 2 -- drivers/nvdimm/pmem.c | 1 - include/linux/backing-dev.h | 9 --------- mm/swapfile.c | 2 +- 6 files changed, 14 insertions(+), 20 deletions(-) diff --git a/drivers/block/brd.c b/drivers/block/brd.c index 2723a70eb85593..cc49a921339f77 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -403,7 +403,6 @@ static struct brd_device *brd_alloc(int i) disk->flags = GENHD_FL_EXT_DEVT; sprintf(disk->disk_name, "ram%d", i); set_capacity(disk, rd_size * 2); - brd->brd_queue->backing_dev_info->capabilities |= BDI_CAP_SYNCHRONOUS_IO; /* Tell the block layer that this is not a rotational device */ blk_queue_flag_set(QUEUE_FLAG_NONROT, brd->brd_queue); diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 91ccfe444525b4..e21ca844d7c291 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -52,6 +52,9 @@ static unsigned int num_devices = 1; */ static size_t huge_class_size; +static const struct block_device_operations zram_devops; +static const struct block_device_operations zram_wb_devops; + static void zram_free_page(struct zram *zram, size_t index); static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec, u32 index, int offset, struct bio *bio); @@ -408,8 +411,7 @@ static void reset_bdev(struct zram *zram) zram->backing_dev = NULL; zram->old_block_size = 0; zram->bdev = NULL; - zram->disk->queue->backing_dev_info->capabilities |= - BDI_CAP_SYNCHRONOUS_IO; + zram->disk->fops = &zram_devops; kvfree(zram->bitmap); zram->bitmap = NULL; } @@ -529,8 +531,7 @@ static ssize_t backing_dev_store(struct device *dev, * freely but in fact, IO is going on so finally could cause * use-after-free when the IO is really done. */ - zram->disk->queue->backing_dev_info->capabilities &= - ~BDI_CAP_SYNCHRONOUS_IO; + zram->disk->fops = &zram_wb_devops; up_write(&zram->init_lock); pr_info("setup backing device %s\n", file_name); @@ -1820,6 +1821,13 @@ static const struct block_device_operations zram_devops = { .owner = THIS_MODULE }; +static const struct block_device_operations zram_wb_devops = { + .open = zram_open, + .submit_bio = zram_submit_bio, + .swap_slot_free_notify = zram_slot_free_notify, + .owner = THIS_MODULE +}; + static DEVICE_ATTR_WO(compact); static DEVICE_ATTR_RW(disksize); static DEVICE_ATTR_RO(initstate); @@ -1947,8 +1955,7 @@ static int zram_add(void) if (ZRAM_LOGICAL_BLOCK_SIZE == PAGE_SIZE) blk_queue_max_write_zeroes_sectors(zram->disk->queue, UINT_MAX); - zram->disk->queue->backing_dev_info->capabilities |= - (BDI_CAP_STABLE_WRITES | BDI_CAP_SYNCHRONOUS_IO); + zram->disk->queue->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; device_add_disk(NULL, zram->disk, zram_disk_attr_groups); strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor)); diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c index 0d710140bf93be..12ff6f8784ac11 100644 --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -1537,8 +1537,6 @@ static int btt_blk_init(struct btt *btt) btt->btt_disk->private_data = btt; btt->btt_disk->queue = btt->btt_queue; btt->btt_disk->flags = GENHD_FL_EXT_DEVT; - btt->btt_disk->queue->backing_dev_info->capabilities |= - BDI_CAP_SYNCHRONOUS_IO; blk_queue_logical_block_size(btt->btt_queue, btt->sector_size); blk_queue_max_hw_sectors(btt->btt_queue, UINT_MAX); diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 140cf3b9000c60..1711fdfd8d2816 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -475,7 +475,6 @@ static int pmem_attach_disk(struct device *dev, disk->queue = q; disk->flags = GENHD_FL_EXT_DEVT; disk->private_data = pmem; - disk->queue->backing_dev_info->capabilities |= BDI_CAP_SYNCHRONOUS_IO; nvdimm_namespace_disk_name(ndns, disk->disk_name); set_capacity(disk, (pmem->size - pmem->pfn_pad - pmem->data_offset) / 512); diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 52583b6f2ea05d..860ea33571bce5 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -122,9 +122,6 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio); * BDI_CAP_NO_WRITEBACK: Don't write pages back * BDI_CAP_NO_ACCT_WB: Don't automatically account writeback pages * BDI_CAP_STRICTLIMIT: Keep number of dirty pages below bdi threshold. - * - * BDI_CAP_SYNCHRONOUS_IO: Device is so fast that asynchronous IO would be - * inefficient. */ #define BDI_CAP_NO_ACCT_DIRTY 0x00000001 #define BDI_CAP_NO_WRITEBACK 0x00000002 @@ -132,7 +129,6 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio); #define BDI_CAP_STABLE_WRITES 0x00000008 #define BDI_CAP_STRICTLIMIT 0x00000010 #define BDI_CAP_CGROUP_WRITEBACK 0x00000020 -#define BDI_CAP_SYNCHRONOUS_IO 0x00000040 #define BDI_CAP_NO_ACCT_AND_WRITEBACK \ (BDI_CAP_NO_WRITEBACK | BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_ACCT_WB) @@ -174,11 +170,6 @@ static inline int wb_congested(struct bdi_writeback *wb, int cong_bits) long congestion_wait(int sync, long timeout); long wait_iff_congested(int sync, long timeout); -static inline bool bdi_cap_synchronous_io(struct backing_dev_info *bdi) -{ - return bdi->capabilities & BDI_CAP_SYNCHRONOUS_IO; -} - static inline bool bdi_cap_stable_pages_required(struct backing_dev_info *bdi) { return bdi->capabilities & BDI_CAP_STABLE_WRITES; diff --git a/mm/swapfile.c b/mm/swapfile.c index b90f8692074397..96a7c47dd533e4 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -3240,7 +3240,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) if (bdi_cap_stable_pages_required(inode_to_bdi(inode))) p->flags |= SWP_STABLE_WRITES; - if (bdi_cap_synchronous_io(inode_to_bdi(inode))) + if (p->bdev && p->bdev->bd_disk->fops->rw_page) p->flags |= SWP_SYNCHRONOUS_IO; if (p->bdev && blk_queue_nonrot(bdev_get_queue(p->bdev))) { From patchwork Thu Sep 24 06:51:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796315 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DFA2B59D for ; 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Thu, 24 Sep 2020 06:52:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=I7MiMBMaLkYFUGes/ZWFe9+6oC03kpbTj/tDtF5mSAI=; b=HBV7buYwNGxLjnd9sKeF7GQtNd UUng2lV5nzMBVocQjMJSGvXEI7sktQeKMwftgvg4UpKQtWdhfppv4NN68VOfRxhs2AdfzB1IqD9hH KTi83p7TAhICaZXOWgf12gtgYMLeUY2v9WOR6e7tF9OtS/t3wTzJjS1Wlg72Xb+GqsHf+/HjmZexD aAP+osOrfycWYvhQe7qgPvpGZ3+pd/DZgSk+a0TwPtkGoVdN/ET1Ip4RZPCknuQDHzkp5yZImuI2h 3vf/j5EpbrtatQcXUqcFFnzLMGAPpDgjtTfOIGuyC3xVHvzY2+EI93Q5rhcBKR/d6QQq97dU2mRiG SNIwLOmQ==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6g-0001BE-Us; Thu, 24 Sep 2020 06:51:55 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara , Johannes Thumshirn Subject: [PATCH 10/13] mm: use SWP_SYNCHRONOUS_IO more intelligently Date: Thu, 24 Sep 2020 08:51:37 +0200 Message-Id: <20200924065140.726436-11-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: There is no point in trying to call bdev_read_page if SWP_SYNCHRONOUS_IO is not set, as the device won't support it. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn --- mm/page_io.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/mm/page_io.c b/mm/page_io.c index e485a6e8a6cddb..b199b87e0aa92b 100644 --- a/mm/page_io.c +++ b/mm/page_io.c @@ -403,15 +403,17 @@ int swap_readpage(struct page *page, bool synchronous) goto out; } - ret = bdev_read_page(sis->bdev, swap_page_sector(page), page); - if (!ret) { - if (trylock_page(page)) { - swap_slot_free_notify(page); - unlock_page(page); - } + if (sis->flags & SWP_SYNCHRONOUS_IO) { + ret = bdev_read_page(sis->bdev, swap_page_sector(page), page); + if (!ret) { + if (trylock_page(page)) { + swap_slot_free_notify(page); + unlock_page(page); + } - count_vm_event(PSWPIN); - goto out; + count_vm_event(PSWPIN); + goto out; + } } ret = 0; From patchwork Thu Sep 24 06:51:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796329 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 86E5A6CA for ; 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See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The BDI_CAP_STABLE_WRITES is one of the few bits of information in the backing_dev_info shared between the block drivers and the writeback code. To help untangling the dependency replace it with a queue flag and a superblock flag derived from it. This also helps with the case of e.g. a file system requiring stable writes due to its own checksumming, but not forcing it on other users of the block device like the swap code. One downside is that we an't support the stable_pages_required bdi attribute in sysfs anymore. It is replaced with a queue attribute which also is writable for easier testing. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn --- block/blk-integrity.c | 4 ++-- block/blk-mq-debugfs.c | 1 + block/blk-sysfs.c | 3 +++ drivers/block/rbd.c | 2 +- drivers/block/zram/zram_drv.c | 2 +- drivers/md/dm-table.c | 6 +++--- drivers/md/raid5.c | 8 ++++---- drivers/mmc/core/queue.c | 3 +-- drivers/nvme/host/core.c | 3 +-- drivers/nvme/host/multipath.c | 10 +++------- drivers/scsi/iscsi_tcp.c | 4 ++-- fs/super.c | 2 ++ include/linux/backing-dev.h | 6 ------ include/linux/blkdev.h | 3 +++ include/linux/fs.h | 1 + mm/backing-dev.c | 7 +++---- mm/page-writeback.c | 2 +- mm/swapfile.c | 2 +- 18 files changed, 33 insertions(+), 36 deletions(-) diff --git a/block/blk-integrity.c b/block/blk-integrity.c index c03705cbb9c9f2..2b36a8f9b81390 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -408,7 +408,7 @@ void blk_integrity_register(struct gendisk *disk, struct blk_integrity *template bi->tuple_size = template->tuple_size; bi->tag_size = template->tag_size; - disk->queue->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, disk->queue); #ifdef CONFIG_BLK_INLINE_ENCRYPTION if (disk->queue->ksm) { @@ -428,7 +428,7 @@ EXPORT_SYMBOL(blk_integrity_register); */ void blk_integrity_unregister(struct gendisk *disk) { - disk->queue->backing_dev_info->capabilities &= ~BDI_CAP_STABLE_WRITES; + blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, disk->queue); memset(&disk->queue->integrity, 0, sizeof(struct blk_integrity)); } EXPORT_SYMBOL(blk_integrity_unregister); diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 645b7f800cb827..3094542e12ae0f 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -116,6 +116,7 @@ static const char *const blk_queue_flag_name[] = { QUEUE_FLAG_NAME(SAME_FORCE), QUEUE_FLAG_NAME(DEAD), QUEUE_FLAG_NAME(INIT_DONE), + QUEUE_FLAG_NAME(STABLE_WRITES), QUEUE_FLAG_NAME(POLL), QUEUE_FLAG_NAME(WC), QUEUE_FLAG_NAME(FUA), diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 869ed21a9edcab..76b54c7750b07e 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -287,6 +287,7 @@ queue_##name##_store(struct request_queue *q, const char *page, size_t count) \ QUEUE_SYSFS_BIT_FNS(nonrot, NONROT, 1); QUEUE_SYSFS_BIT_FNS(random, ADD_RANDOM, 0); QUEUE_SYSFS_BIT_FNS(iostats, IO_STAT, 0); +QUEUE_SYSFS_BIT_FNS(stable_writes, STABLE_WRITES, 0); #undef QUEUE_SYSFS_BIT_FNS static ssize_t queue_zoned_show(struct request_queue *q, char *page) @@ -613,6 +614,7 @@ static struct queue_sysfs_entry queue_hw_sector_size_entry = { QUEUE_RW_ENTRY(queue_nonrot, "rotational"); QUEUE_RW_ENTRY(queue_iostats, "iostats"); QUEUE_RW_ENTRY(queue_random, "add_random"); +QUEUE_RW_ENTRY(queue_stable_writes, "stable_writes"); static struct attribute *queue_attrs[] = { &queue_requests_entry.attr, @@ -645,6 +647,7 @@ static struct attribute *queue_attrs[] = { &queue_nomerges_entry.attr, &queue_rq_affinity_entry.attr, &queue_iostats_entry.attr, + &queue_stable_writes_entry.attr, &queue_random_entry.attr, &queue_poll_entry.attr, &queue_wc_entry.attr, diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 5d3923c0997ce0..cf5b016358cdab 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -5022,7 +5022,7 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) } if (!ceph_test_opt(rbd_dev->rbd_client->client, NOCRC)) - q->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q); /* * disk_release() expects a queue ref from add_disk() and will diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index e21ca844d7c291..bff3d4021c18e1 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1955,7 +1955,7 @@ static int zram_add(void) if (ZRAM_LOGICAL_BLOCK_SIZE == PAGE_SIZE) blk_queue_max_write_zeroes_sectors(zram->disk->queue, UINT_MAX); - zram->disk->queue->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, zram->disk->queue); device_add_disk(NULL, zram->disk, zram_disk_attr_groups); strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor)); diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index ef2757012f59d5..405d7cf10eb973 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1815,7 +1815,7 @@ static int device_requires_stable_pages(struct dm_target *ti, { struct request_queue *q = bdev_get_queue(dev->bdev); - return q && bdi_cap_stable_pages_required(q->backing_dev_info); + return q && blk_queue_stable_writes(q); } /* @@ -1900,9 +1900,9 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, * because they do their own checksumming. */ if (dm_table_requires_stable_pages(t)) - q->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q); else - q->backing_dev_info->capabilities &= ~BDI_CAP_STABLE_WRITES; + blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, q); /* * Determine whether or not this queue's I/O timings contribute diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 7ace1f76b14736..d589d26c86ea3f 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -6638,14 +6638,14 @@ raid5_store_skip_copy(struct mddev *mddev, const char *page, size_t len) if (!conf) err = -ENODEV; else if (new != conf->skip_copy) { + struct request_queue *q = mddev->queue; + mddev_suspend(mddev); conf->skip_copy = new; if (new) - mddev->queue->backing_dev_info->capabilities |= - BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, q); else - mddev->queue->backing_dev_info->capabilities &= - ~BDI_CAP_STABLE_WRITES; + blk_queue_flag_clear(QUEUE_FLAG_STABLE_WRITES, q); mddev_resume(mddev); } mddev_unlock(mddev); diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c index 6c022ef0f84d72..80fe3852ce0f75 100644 --- a/drivers/mmc/core/queue.c +++ b/drivers/mmc/core/queue.c @@ -472,8 +472,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card) } if (mmc_host_is_spi(host) && host->use_spi_crc) - mq->queue->backing_dev_info->capabilities |= - BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, mq->queue); mq->queue->queuedata = mq; blk_queue_rq_timeout(mq->queue, 60 * HZ); diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 741c9bfa8e14c7..c190c56bf7020d 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3926,8 +3926,7 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) goto out_free_ns; if (ctrl->opts && ctrl->opts->data_digest) - ns->queue->backing_dev_info->capabilities - |= BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, ns->queue); blk_queue_flag_set(QUEUE_FLAG_NONROT, ns->queue); if (ctrl->ops->flags & NVME_F_PCI_P2PDMA) diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index d4ba736c6c8905..74896be40c1769 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -673,13 +673,9 @@ void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id) nvme_mpath_set_live(ns); } - if (bdi_cap_stable_pages_required(ns->queue->backing_dev_info)) { - struct gendisk *disk = ns->head->disk; - - if (disk) - disk->queue->backing_dev_info->capabilities |= - BDI_CAP_STABLE_WRITES; - } + if (blk_queue_stable_writes(ns->queue) && ns->head->disk) + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, + ns->head->disk->queue); } void nvme_mpath_remove_disk(struct nvme_ns_head *head) diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index b5dd1caae5e92d..a622f334c933f5 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -962,8 +962,8 @@ static int iscsi_sw_tcp_slave_configure(struct scsi_device *sdev) struct iscsi_conn *conn = session->leadconn; if (conn->datadgst_en) - sdev->request_queue->backing_dev_info->capabilities - |= BDI_CAP_STABLE_WRITES; + blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, + sdev->request_queue); blk_queue_dma_alignment(sdev->request_queue, 0); return 0; } diff --git a/fs/super.c b/fs/super.c index 904459b3511995..a51c2083cd6b18 100644 --- a/fs/super.c +++ b/fs/super.c @@ -1256,6 +1256,8 @@ static int set_bdev_super(struct super_block *s, void *data) s->s_dev = s->s_bdev->bd_dev; s->s_bdi = bdi_get(s->s_bdev->bd_bdi); + if (blk_queue_stable_writes(s->s_bdev->bd_disk->queue)) + s->s_iflags |= SB_I_STABLE_WRITES; return 0; } diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 860ea33571bce5..5da4ea3dd0cc5c 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -126,7 +126,6 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio); #define BDI_CAP_NO_ACCT_DIRTY 0x00000001 #define BDI_CAP_NO_WRITEBACK 0x00000002 #define BDI_CAP_NO_ACCT_WB 0x00000004 -#define BDI_CAP_STABLE_WRITES 0x00000008 #define BDI_CAP_STRICTLIMIT 0x00000010 #define BDI_CAP_CGROUP_WRITEBACK 0x00000020 @@ -170,11 +169,6 @@ static inline int wb_congested(struct bdi_writeback *wb, int cong_bits) long congestion_wait(int sync, long timeout); long wait_iff_congested(int sync, long timeout); -static inline bool bdi_cap_stable_pages_required(struct backing_dev_info *bdi) -{ - return bdi->capabilities & BDI_CAP_STABLE_WRITES; -} - static inline bool bdi_cap_writeback_dirty(struct backing_dev_info *bdi) { return !(bdi->capabilities & BDI_CAP_NO_WRITEBACK); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 282f5ca424f14a..8e77f12de52214 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -606,6 +606,7 @@ struct request_queue { #define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */ #define QUEUE_FLAG_DEAD 13 /* queue tear-down finished */ #define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */ +#define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */ #define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */ #define QUEUE_FLAG_WC 17 /* Write back caching */ #define QUEUE_FLAG_FUA 18 /* device supports FUA writes */ @@ -635,6 +636,8 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q); #define blk_queue_noxmerges(q) \ test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags) #define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags) +#define blk_queue_stable_writes(q) \ + test_bit(QUEUE_FLAG_STABLE_WRITES, &(q)->queue_flags) #define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags) #define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags) #define blk_queue_discard(q) test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags) diff --git a/include/linux/fs.h b/include/linux/fs.h index fbd74df5ce5f34..222465b7cf4178 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1385,6 +1385,7 @@ extern int send_sigurg(struct fown_struct *fown); #define SB_I_CGROUPWB 0x00000001 /* cgroup-aware writeback enabled */ #define SB_I_NOEXEC 0x00000002 /* Ignore executables on this fs */ #define SB_I_NODEV 0x00000004 /* Ignore devices on this fs */ +#define SB_I_STABLE_WRITES 0x00000008 /* don't modify blks until WB is done */ /* sb->s_iflags to limit user namespace mounts */ #define SB_I_USERNS_VISIBLE 0x00000010 /* fstype already mounted */ diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 2dac3be6127127..8e3802bf03a968 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -204,10 +204,9 @@ static ssize_t stable_pages_required_show(struct device *dev, struct device_attribute *attr, char *page) { - struct backing_dev_info *bdi = dev_get_drvdata(dev); - - return snprintf(page, PAGE_SIZE-1, "%d\n", - bdi_cap_stable_pages_required(bdi) ? 1 : 0); + dev_warn_once(dev, + "the stable_pages_required attribute has been removed. Use the stable_writes queue attribute instead.\n"); + return snprintf(page, PAGE_SIZE-1, "%d\n", 0); } static DEVICE_ATTR_RO(stable_pages_required); diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 4e4ddd67b71e58..e9c36521461aaa 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2849,7 +2849,7 @@ EXPORT_SYMBOL_GPL(wait_on_page_writeback); */ void wait_for_stable_page(struct page *page) { - if (bdi_cap_stable_pages_required(inode_to_bdi(page->mapping->host))) + if (page->mapping->host->i_sb->s_iflags & SB_I_STABLE_WRITES) wait_on_page_writeback(page); } EXPORT_SYMBOL_GPL(wait_for_stable_page); diff --git a/mm/swapfile.c b/mm/swapfile.c index 96a7c47dd533e4..65ef407512b5b0 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -3237,7 +3237,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) goto bad_swap_unlock_inode; } - if (bdi_cap_stable_pages_required(inode_to_bdi(inode))) + if (p->bdev && blk_queue_stable_writes(p->bdev->bd_disk->queue)) p->flags |= SWP_STABLE_WRITES; if (p->bdev && p->bdev->bd_disk->fops->rw_page) From patchwork Thu Sep 24 06:51:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796331 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2AE6E59D for ; Thu, 24 Sep 2020 06:52:23 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E05D42395B for ; Thu, 24 Sep 2020 06:52:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="FUjCrvU6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E05D42395B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 590278E0008; 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Thu, 24 Sep 2020 06:52:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=XopQpzpw3KoIwQKF1nuIAvoWKkMjHrthqtRC/LQIsIM=; b=FUjCrvU6H2vva9OlbvPRBjueT5 3WXeoJz7jDgz3iw1Mg+Iopz/QJv6nWDYq/GeZgV0pNiTlmEizWOs5noXGIap262ObPZLLRr7tvE8r JNstR6W2pQXp1QSypUIAUd6VajwetTYHmxREzhwHzIiglVM/1kYN8t+yrxAp2LIA9cOfWRrvBdCLS G605Ys2cGihmniidppqvKePiGkYbfjsW9VA/Aj55jf2UW1wyYJDiPsfLR3g1zI2EYw4T57DMfQJ+i gxrErAJDe9sH140Q+m+FmHzsKzsELzKsSi7UI7xmwOqgFxtavnbxKa6xUMzx4tWiinIxQeTWJ+g6u tHziqaFg==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6j-0001Bg-1R; Thu, 24 Sep 2020 06:51:57 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara , Johannes Thumshirn Subject: [PATCH 12/13] bdi: invert BDI_CAP_NO_ACCT_WB Date: Thu, 24 Sep 2020 08:51:39 +0200 Message-Id: <20200924065140.726436-13-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Replace BDI_CAP_NO_ACCT_WB with a positive BDI_CAP_WRITEBACK_ACCT to make the checks more obvious. Also remove the pointless bdi_cap_account_writeback wrapper that just obsfucates the check. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn --- fs/fuse/inode.c | 3 ++- include/linux/backing-dev.h | 13 +++---------- mm/backing-dev.c | 1 + mm/page-writeback.c | 4 ++-- 4 files changed, 8 insertions(+), 13 deletions(-) diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 17b00670fb539e..581329203d6860 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -1050,7 +1050,8 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb) return err; /* fuse does it's own writeback accounting */ - sb->s_bdi->capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT; + sb->s_bdi->capabilities &= ~BDI_CAP_WRITEBACK_ACCT; + sb->s_bdi->capabilities |= BDI_CAP_STRICTLIMIT; /* * For a single fuse filesystem use max 1% of dirty + diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 5da4ea3dd0cc5c..b217344a2c63be 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -120,17 +120,17 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio); * * BDI_CAP_NO_ACCT_DIRTY: Dirty pages shouldn't contribute to accounting * BDI_CAP_NO_WRITEBACK: Don't write pages back - * BDI_CAP_NO_ACCT_WB: Don't automatically account writeback pages + * BDI_CAP_WRITEBACK_ACCT: Automatically account writeback pages * BDI_CAP_STRICTLIMIT: Keep number of dirty pages below bdi threshold. */ #define BDI_CAP_NO_ACCT_DIRTY 0x00000001 #define BDI_CAP_NO_WRITEBACK 0x00000002 -#define BDI_CAP_NO_ACCT_WB 0x00000004 +#define BDI_CAP_WRITEBACK_ACCT 0x00000004 #define BDI_CAP_STRICTLIMIT 0x00000010 #define BDI_CAP_CGROUP_WRITEBACK 0x00000020 #define BDI_CAP_NO_ACCT_AND_WRITEBACK \ - (BDI_CAP_NO_WRITEBACK | BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_ACCT_WB) + (BDI_CAP_NO_WRITEBACK | BDI_CAP_NO_ACCT_DIRTY) extern struct backing_dev_info noop_backing_dev_info; @@ -179,13 +179,6 @@ static inline bool bdi_cap_account_dirty(struct backing_dev_info *bdi) return !(bdi->capabilities & BDI_CAP_NO_ACCT_DIRTY); } -static inline bool bdi_cap_account_writeback(struct backing_dev_info *bdi) -{ - /* Paranoia: BDI_CAP_NO_WRITEBACK implies BDI_CAP_NO_ACCT_WB */ - return !(bdi->capabilities & (BDI_CAP_NO_ACCT_WB | - BDI_CAP_NO_WRITEBACK)); -} - static inline bool mapping_cap_writeback_dirty(struct address_space *mapping) { return bdi_cap_writeback_dirty(inode_to_bdi(mapping->host)); diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 8e3802bf03a968..df18f0088dd3f5 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -745,6 +745,7 @@ struct backing_dev_info *bdi_alloc(int node_id) kfree(bdi); return NULL; } + bdi->capabilities = BDI_CAP_WRITEBACK_ACCT; bdi->ra_pages = VM_READAHEAD_PAGES; bdi->io_pages = VM_READAHEAD_PAGES; return bdi; diff --git a/mm/page-writeback.c b/mm/page-writeback.c index e9c36521461aaa..0139f9622a92da 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2738,7 +2738,7 @@ int test_clear_page_writeback(struct page *page) if (ret) { __xa_clear_mark(&mapping->i_pages, page_index(page), PAGECACHE_TAG_WRITEBACK); - if (bdi_cap_account_writeback(bdi)) { + if (bdi->capabilities & BDI_CAP_WRITEBACK_ACCT) { struct bdi_writeback *wb = inode_to_wb(inode); dec_wb_stat(wb, WB_WRITEBACK); @@ -2791,7 +2791,7 @@ int __test_set_page_writeback(struct page *page, bool keep_write) PAGECACHE_TAG_WRITEBACK); xas_set_mark(&xas, PAGECACHE_TAG_WRITEBACK); - if (bdi_cap_account_writeback(bdi)) + if (bdi->capabilities & BDI_CAP_WRITEBACK_ACCT) inc_wb_stat(inode_to_wb(inode), WB_WRITEBACK); /* From patchwork Thu Sep 24 06:51:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11796337 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 50C58139F for ; Thu, 24 Sep 2020 06:52:29 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F36732388A for ; Thu, 24 Sep 2020 06:52:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="bFWX5KW1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F36732388A Authentication-Results: mail.kernel.org; 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Thu, 24 Sep 2020 06:52:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=MY4XScv0SUe+8z8haC+/G063lSniL07sW1RR2khIdts=; b=bFWX5KW1+dmQG/JunZeGU8Et2A pzex90SSQYMWEuC3tqMSjNa31gCsympmamtumAZ18hUZC9v7YTDYDh6KBYa85B0Abx+5KjwuXh9SP n1omaYjMYLVna7FpV6ybuPLXe7EhKb5mB+k9NCgLob/hVTjnclgCnXmNAM4VoIqCdVZFLvOQ/GzuP UQTRjz5tvyhIJj1JmVvnnFHxZKCJlp28/6/xnnjX37A48+cAbw/anB+B3mK/WRnO0Qt6L9uGX/KVv 6o15Y8Xw7m7SCCM3nGv2gAnRzkqio1zuXWxDoaVRdEWn2dxwLfGrRdmxoOSHLLlEViNv11v+/15Xf gXeQiZfw==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLL6k-0001Bw-79; Thu, 24 Sep 2020 06:51:58 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara , Johannes Thumshirn Subject: [PATCH 13/13] bdi: replace BDI_CAP_NO_{WRITEBACK,ACCT_DIRTY} with a single flag Date: Thu, 24 Sep 2020 08:51:40 +0200 Message-Id: <20200924065140.726436-14-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924065140.726436-1-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Replace the two negative flags that are always used together with a single positive flag that indicates the writeback capability instead of two related non-capabilities. Also remove the pointless wrappers to just check the flag. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara Reviewed-by: Johannes Thumshirn --- fs/9p/vfs_file.c | 2 +- fs/fs-writeback.c | 7 +++--- include/linux/backing-dev.h | 48 ++++++++----------------------------- mm/backing-dev.c | 6 ++--- mm/filemap.c | 4 ++-- mm/memcontrol.c | 2 +- mm/memory-failure.c | 2 +- mm/migrate.c | 2 +- mm/mmap.c | 2 +- mm/page-writeback.c | 12 +++++----- 10 files changed, 29 insertions(+), 58 deletions(-) diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 3576123d82990e..6ecf863bfa2f4b 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -625,7 +625,7 @@ static void v9fs_mmap_vm_close(struct vm_area_struct *vma) inode = file_inode(vma->vm_file); - if (!mapping_cap_writeback_dirty(inode->i_mapping)) + if (!mapping_can_writeback(inode->i_mapping)) wbc.nr_to_write = 0; might_sleep(); diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 149227160ff0b0..d4f84a2fe0878e 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -2321,7 +2321,7 @@ void __mark_inode_dirty(struct inode *inode, int flags) wb = locked_inode_to_wb_and_lock_list(inode); - WARN(bdi_cap_writeback_dirty(wb->bdi) && + WARN((wb->bdi->capabilities & BDI_CAP_WRITEBACK) && !test_bit(WB_registered, &wb->state), "bdi-%s not registered\n", bdi_dev_name(wb->bdi)); @@ -2346,7 +2346,8 @@ void __mark_inode_dirty(struct inode *inode, int flags) * to make sure background write-back happens * later. */ - if (bdi_cap_writeback_dirty(wb->bdi) && wakeup_bdi) + if (wakeup_bdi && + (wb->bdi->capabilities & BDI_CAP_WRITEBACK)) wb_wakeup_delayed(wb); return; } @@ -2581,7 +2582,7 @@ int write_inode_now(struct inode *inode, int sync) .range_end = LLONG_MAX, }; - if (!mapping_cap_writeback_dirty(inode->i_mapping)) + if (!mapping_can_writeback(inode->i_mapping)) wbc.nr_to_write = 0; might_sleep(); diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index b217344a2c63be..44df4fcef65c1e 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -110,27 +110,14 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio); /* * Flags in backing_dev_info::capability * - * The first three flags control whether dirty pages will contribute to the - * VM's accounting and whether writepages() should be called for dirty pages - * (something that would not, for example, be appropriate for ramfs) - * - * WARNING: these flags are closely related and should not normally be - * used separately. The BDI_CAP_NO_ACCT_AND_WRITEBACK combines these - * three flags into a single convenience macro. - * - * BDI_CAP_NO_ACCT_DIRTY: Dirty pages shouldn't contribute to accounting - * BDI_CAP_NO_WRITEBACK: Don't write pages back - * BDI_CAP_WRITEBACK_ACCT: Automatically account writeback pages - * BDI_CAP_STRICTLIMIT: Keep number of dirty pages below bdi threshold. + * BDI_CAP_WRITEBACK: Supports dirty page writeback, and dirty pages + * should contribute to accounting + * BDI_CAP_WRITEBACK_ACCT: Automatically account writeback pages + * BDI_CAP_STRICTLIMIT: Keep number of dirty pages below bdi threshold */ -#define BDI_CAP_NO_ACCT_DIRTY 0x00000001 -#define BDI_CAP_NO_WRITEBACK 0x00000002 -#define BDI_CAP_WRITEBACK_ACCT 0x00000004 -#define BDI_CAP_STRICTLIMIT 0x00000010 -#define BDI_CAP_CGROUP_WRITEBACK 0x00000020 - -#define BDI_CAP_NO_ACCT_AND_WRITEBACK \ - (BDI_CAP_NO_WRITEBACK | BDI_CAP_NO_ACCT_DIRTY) +#define BDI_CAP_WRITEBACK (1 << 0) +#define BDI_CAP_WRITEBACK_ACCT (1 << 1) +#define BDI_CAP_STRICTLIMIT (1 << 2) extern struct backing_dev_info noop_backing_dev_info; @@ -169,24 +156,9 @@ static inline int wb_congested(struct bdi_writeback *wb, int cong_bits) long congestion_wait(int sync, long timeout); long wait_iff_congested(int sync, long timeout); -static inline bool bdi_cap_writeback_dirty(struct backing_dev_info *bdi) -{ - return !(bdi->capabilities & BDI_CAP_NO_WRITEBACK); -} - -static inline bool bdi_cap_account_dirty(struct backing_dev_info *bdi) -{ - return !(bdi->capabilities & BDI_CAP_NO_ACCT_DIRTY); -} - -static inline bool mapping_cap_writeback_dirty(struct address_space *mapping) -{ - return bdi_cap_writeback_dirty(inode_to_bdi(mapping->host)); -} - -static inline bool mapping_cap_account_dirty(struct address_space *mapping) +static inline bool mapping_can_writeback(struct address_space *mapping) { - return bdi_cap_account_dirty(inode_to_bdi(mapping->host)); + return inode_to_bdi(mapping->host)->capabilities & BDI_CAP_WRITEBACK; } static inline int bdi_sched_wait(void *word) @@ -223,7 +195,7 @@ static inline bool inode_cgwb_enabled(struct inode *inode) return cgroup_subsys_on_dfl(memory_cgrp_subsys) && cgroup_subsys_on_dfl(io_cgrp_subsys) && - bdi_cap_account_dirty(bdi) && + (bdi->capabilities & BDI_CAP_WRITEBACK) && (inode->i_sb->s_iflags & SB_I_CGROUPWB); } diff --git a/mm/backing-dev.c b/mm/backing-dev.c index df18f0088dd3f5..408d5051d05b3d 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -14,9 +14,7 @@ #include #include -struct backing_dev_info noop_backing_dev_info = { - .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK, -}; +struct backing_dev_info noop_backing_dev_info; EXPORT_SYMBOL_GPL(noop_backing_dev_info); static struct class *bdi_class; @@ -745,7 +743,7 @@ struct backing_dev_info *bdi_alloc(int node_id) kfree(bdi); return NULL; } - bdi->capabilities = BDI_CAP_WRITEBACK_ACCT; + bdi->capabilities = BDI_CAP_WRITEBACK | BDI_CAP_WRITEBACK_ACCT; bdi->ra_pages = VM_READAHEAD_PAGES; bdi->io_pages = VM_READAHEAD_PAGES; return bdi; diff --git a/mm/filemap.c b/mm/filemap.c index 1aaea26556cc7e..6c2a0139e22fa3 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -414,7 +414,7 @@ int __filemap_fdatawrite_range(struct address_space *mapping, loff_t start, .range_end = end, }; - if (!mapping_cap_writeback_dirty(mapping) || + if (!mapping_can_writeback(mapping) || !mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) return 0; @@ -1702,7 +1702,7 @@ struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index, no_page: if (!page && (fgp_flags & FGP_CREAT)) { int err; - if ((fgp_flags & FGP_WRITE) && mapping_cap_account_dirty(mapping)) + if ((fgp_flags & FGP_WRITE) && mapping_can_writeback(mapping)) gfp_mask |= __GFP_WRITE; if (fgp_flags & FGP_NOFS) gfp_mask &= ~__GFP_FS; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b807952b4d431b..d2352f76d6519f 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5643,7 +5643,7 @@ static int mem_cgroup_move_account(struct page *page, if (PageDirty(page)) { struct address_space *mapping = page_mapping(page); - if (mapping_cap_account_dirty(mapping)) { + if (mapping_can_writeback(mapping)) { __mod_lruvec_state(from_vec, NR_FILE_DIRTY, -nr_pages); __mod_lruvec_state(to_vec, NR_FILE_DIRTY, diff --git a/mm/memory-failure.c b/mm/memory-failure.c index f1aa6433f40416..a1e73943445e77 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1006,7 +1006,7 @@ static bool hwpoison_user_mappings(struct page *p, unsigned long pfn, */ mapping = page_mapping(hpage); if (!(flags & MF_MUST_KILL) && !PageDirty(hpage) && mapping && - mapping_cap_writeback_dirty(mapping)) { + mapping_can_writeback(mapping)) { if (page_mkclean(hpage)) { SetPageDirty(hpage); } else { diff --git a/mm/migrate.c b/mm/migrate.c index 34a842a8eb6a7b..9d2f42a3a16294 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -503,7 +503,7 @@ int migrate_page_move_mapping(struct address_space *mapping, __dec_lruvec_state(old_lruvec, NR_SHMEM); __inc_lruvec_state(new_lruvec, NR_SHMEM); } - if (dirty && mapping_cap_account_dirty(mapping)) { + if (dirty && mapping_can_writeback(mapping)) { __dec_node_state(oldzone->zone_pgdat, NR_FILE_DIRTY); __dec_zone_state(oldzone, NR_ZONE_WRITE_PENDING); __inc_node_state(newzone->zone_pgdat, NR_FILE_DIRTY); diff --git a/mm/mmap.c b/mm/mmap.c index 40248d84ad5fbd..1fc0e92be4ba9b 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1666,7 +1666,7 @@ int vma_wants_writenotify(struct vm_area_struct *vma, pgprot_t vm_page_prot) /* Can the mapping track the dirty pages? */ return vma->vm_file && vma->vm_file->f_mapping && - mapping_cap_account_dirty(vma->vm_file->f_mapping); + mapping_can_writeback(vma->vm_file->f_mapping); } /* diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 0139f9622a92da..358d6f28c627b7 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1882,7 +1882,7 @@ void balance_dirty_pages_ratelimited(struct address_space *mapping) int ratelimit; int *p; - if (!bdi_cap_account_dirty(bdi)) + if (!(bdi->capabilities & BDI_CAP_WRITEBACK)) return; if (inode_cgwb_enabled(inode)) @@ -2423,7 +2423,7 @@ void account_page_dirtied(struct page *page, struct address_space *mapping) trace_writeback_dirty_page(page, mapping); - if (mapping_cap_account_dirty(mapping)) { + if (mapping_can_writeback(mapping)) { struct bdi_writeback *wb; inode_attach_wb(inode, page); @@ -2450,7 +2450,7 @@ void account_page_dirtied(struct page *page, struct address_space *mapping) void account_page_cleaned(struct page *page, struct address_space *mapping, struct bdi_writeback *wb) { - if (mapping_cap_account_dirty(mapping)) { + if (mapping_can_writeback(mapping)) { dec_lruvec_page_state(page, NR_FILE_DIRTY); dec_zone_page_state(page, NR_ZONE_WRITE_PENDING); dec_wb_stat(wb, WB_RECLAIMABLE); @@ -2513,7 +2513,7 @@ void account_page_redirty(struct page *page) { struct address_space *mapping = page->mapping; - if (mapping && mapping_cap_account_dirty(mapping)) { + if (mapping && mapping_can_writeback(mapping)) { struct inode *inode = mapping->host; struct bdi_writeback *wb; struct wb_lock_cookie cookie = {}; @@ -2625,7 +2625,7 @@ void __cancel_dirty_page(struct page *page) { struct address_space *mapping = page_mapping(page); - if (mapping_cap_account_dirty(mapping)) { + if (mapping_can_writeback(mapping)) { struct inode *inode = mapping->host; struct bdi_writeback *wb; struct wb_lock_cookie cookie = {}; @@ -2665,7 +2665,7 @@ int clear_page_dirty_for_io(struct page *page) VM_BUG_ON_PAGE(!PageLocked(page), page); - if (mapping && mapping_cap_account_dirty(mapping)) { + if (mapping && mapping_can_writeback(mapping)) { struct inode *inode = mapping->host; struct bdi_writeback *wb; struct wb_lock_cookie cookie = {};