From patchwork Thu Jan 16 04:42:01 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaegeuk Kim X-Patchwork-Id: 13941190 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 04E23E77188 for ; Thu, 16 Jan 2025 04:42:58 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-3.v29.lw.sourceforge.com) by sfs-ml-3.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1tYHid-0003BQ-5u; Thu, 16 Jan 2025 04:42:58 +0000 Received: from [172.30.29.66] (helo=mx.sourceforge.net) by sfs-ml-3.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1tYHib-0003BJ-Iw for linux-f2fs-devel@lists.sourceforge.net; Thu, 16 Jan 2025 04:42:57 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; 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:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=9apYPZCK6iiRlvg31grIPApRFGsdu1wFq4DyEMUcomA=; b=BGBQ28OmfQJb9IZnU+4rg8leyT y9ggtaU6vi5dkd9dSjRQfXvdk3BLDnckrS3prinK3lg1ybF95tF+9eGE050UaE8/RskWPx4oAtV8P l7/LD6HRtKJL7iPgp7wmIfVPZtfmUgm66YTgVp4L6gMFfK/4xNpWqJ+1E2T/ZfWtLOuo=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; 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:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=9apYPZCK6iiRlvg31grIPApRFGsdu1wFq4DyEMUcomA=; b=dnKcspsXLwxKWZ+oZjofuP1+xV +QmE22zukgwsLk2+gl4cASDl/JF2x6O1H9YBRTDKK+KytNpABQ20QVU/OA6VbWPUOtC258ZyQhiBc 7n4Y8TabDRmqF8VfyRho5OACjhOLzUVA6g92FFaunqnjE29cuw+BMSZUyVnvI7Wb6PM4=; Received: from nyc.source.kernel.org ([147.75.193.91]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1tYHia-0002wv-4x for linux-f2fs-devel@lists.sourceforge.net; Thu, 16 Jan 2025 04:42:56 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 6F32FA40AB6 for ; Thu, 16 Jan 2025 04:41:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09108C4CED6; Thu, 16 Jan 2025 04:42:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737002570; bh=F0vkTJTkyTvfngV4uDlYkjuPGTuyhZdjL5IwXGCY0oc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z2rE43/sFhGn7T5KZrt987GDBuL4zSOHhKXVn/YWSAaljd9svC3G6Y8svVSxxQHY6 bbiD4roG11l77jNibtbHyOGMe7Bzfdik8SJRi/ztk8LZvwffu1jhBG666uC4jXuqI8 9lW8/gVKwH5PkUvL8+54jZahjZ3eqfIoKGk4Yhhnb0Xeb+vc6eLlQ98x7nC34UhEn3 BU0a0mQJKQgKmfpzMEJoNIUTvu82xxF+oBzQC+Xg6/ViUAfo/fs0MiiA4hLkg8KjIB Sy5+14dW1V/WFX/yvVM89nRJGAA0p2FnKFctFIadll7urL+N+/MF6SyYbYC4eyBTki 8UsdRACK3LXDw== To: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Date: Thu, 16 Jan 2025 04:42:01 +0000 Message-ID: <20250116044245.1995715-3-jaegeuk@kernel.org> X-Mailer: git-send-email 2.48.0.rc2.279.g1de40edade-goog In-Reply-To: <20250116044245.1995715-1-jaegeuk@kernel.org> References: <20250116044245.1995715-1-jaegeuk@kernel.org> MIME-Version: 1.0 X-Headers-End: 1tYHia-0002wv-4x Subject: [f2fs-dev] [PATCH 2/2] f2fs: add a sysfs entry to request donate file-backed pages X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Jaegeuk Kim via Linux-f2fs-devel From: Jaegeuk Kim Reply-To: Jaegeuk Kim Cc: Jaegeuk Kim Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net 1. ioctl(fd1, F2FS_IOC_DONATE_RANGE, {0,3}); 2. ioctl(fd2, F2FS_IOC_DONATE_RANGE, {1,2}); 3. ioctl(fd3, F2FS_IOC_DONATE_RANGE, {3,1}); 4. echo 3 > /sys/fs/f2fs/blk/donate_caches will reclaim 3 page cache ranges, registered by #1, #2, and #3. Signed-off-by: Jaegeuk Kim --- Documentation/ABI/testing/sysfs-fs-f2fs | 7 +++++++ fs/f2fs/f2fs.h | 2 ++ fs/f2fs/shrinker.c | 27 +++++++++++++++++++++++++ fs/f2fs/sysfs.c | 8 ++++++++ 4 files changed, 44 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 3e1630c70d8a..6f9d8b8889fd 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -828,3 +828,10 @@ Date: November 2024 Contact: "Chao Yu" Description: It controls max read extent count for per-inode, the value of threshold is 10240 by default. + +What: /sys/fs/f2fs//donate_caches +Date: December 2024 +Contact: "Jaegeuk Kim" +Description: It reclaims the certian file-backed pages registered by + ioctl(F2FS_IOC_DONATE_RANGE). + For example, writing N tries to drop N address spaces in LRU. diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 951fbc3f94c7..399ddd10a94f 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1637,6 +1637,7 @@ struct f2fs_sb_info { /* control donate caches */ unsigned int donate_files; + unsigned int donate_caches; /* basic filesystem units */ unsigned int log_sectors_per_block; /* log2 sectors per block */ @@ -4259,6 +4260,7 @@ unsigned long f2fs_shrink_count(struct shrinker *shrink, struct shrink_control *sc); unsigned long f2fs_shrink_scan(struct shrinker *shrink, struct shrink_control *sc); +void f2fs_donate_caches(struct f2fs_sb_info *sbi); void f2fs_join_shrinker(struct f2fs_sb_info *sbi); void f2fs_leave_shrinker(struct f2fs_sb_info *sbi); diff --git a/fs/f2fs/shrinker.c b/fs/f2fs/shrinker.c index 83d6fb97dcae..22f62813910b 100644 --- a/fs/f2fs/shrinker.c +++ b/fs/f2fs/shrinker.c @@ -130,6 +130,33 @@ unsigned long f2fs_shrink_scan(struct shrinker *shrink, return freed; } +void f2fs_donate_caches(struct f2fs_sb_info *sbi) +{ + struct inode *inode; + struct f2fs_inode_info *fi; + int nfiles = sbi->donate_caches; + + while (nfiles--) { + spin_lock(&sbi->inode_lock[DONATE_INODE]); + if (list_empty(&sbi->inode_list[DONATE_INODE])) { + spin_unlock(&sbi->inode_lock[DONATE_INODE]); + break; + } + fi = list_first_entry(&sbi->inode_list[DONATE_INODE], + struct f2fs_inode_info, gdonate_list); + list_move_tail(&fi->gdonate_list, &sbi->inode_list[DONATE_INODE]); + inode = igrab(&fi->vfs_inode); + spin_unlock(&sbi->inode_lock[DONATE_INODE]); + + if (!inode) + continue; + + invalidate_inode_pages2_range(inode->i_mapping, + fi->donate_start, fi->donate_end); + iput(inode); + } +} + void f2fs_join_shrinker(struct f2fs_sb_info *sbi) { spin_lock(&f2fs_list_lock); diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index 6b99dc49f776..f81190fabdd3 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -811,6 +811,12 @@ static ssize_t __sbi_store(struct f2fs_attr *a, return count; } + if (!strcmp(a->attr.name, "donate_caches")) { + sbi->donate_caches = min(t, sbi->donate_files); + f2fs_donate_caches(sbi); + return count; + } + *ui = (unsigned int)t; return count; @@ -1030,6 +1036,7 @@ F2FS_SBI_GENERAL_RW_ATTR(max_victim_search); F2FS_SBI_GENERAL_RW_ATTR(migration_granularity); F2FS_SBI_GENERAL_RW_ATTR(migration_window_granularity); F2FS_SBI_GENERAL_RW_ATTR(dir_level); +F2FS_SBI_GENERAL_RW_ATTR(donate_caches); #ifdef CONFIG_F2FS_IOSTAT F2FS_SBI_GENERAL_RW_ATTR(iostat_enable); F2FS_SBI_GENERAL_RW_ATTR(iostat_period_ms); @@ -1178,6 +1185,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(migration_granularity), ATTR_LIST(migration_window_granularity), ATTR_LIST(dir_level), + ATTR_LIST(donate_caches), ATTR_LIST(ram_thresh), ATTR_LIST(ra_nid_pages), ATTR_LIST(dirty_nats_ratio),