From patchwork Fri May 18 16:48:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10411515 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 371DA602C2 for ; Fri, 18 May 2018 16:58:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 262DD28674 for ; Fri, 18 May 2018 16:58:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1B24928681; Fri, 18 May 2018 16:58:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7C1AE2873C for ; Fri, 18 May 2018 16:58:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751914AbeERQ6R (ORCPT ); Fri, 18 May 2018 12:58:17 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:52178 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752528AbeERQuQ (ORCPT ); Fri, 18 May 2018 12:50:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=D5Q5e9rGzVwB6bZEEw3uvuMLacYpauARMe0+3bZI2kA=; b=Or3STSWHkAKIeksHHK3cTTOmO SGwEokxMYsQSr1+rGT2T9nliqcqTjU+gWJtkB+YS94AocC/+KiHz/LXWGGhsz/Gs2lPt7l6qOu14o jvOJseyBQj+FT5Hijca29a/jmIKmz/hOlwUqPE9pcUt/6Beb9stwOdhksMhzad/yNPAjERKNLSCeB evP6o0JVCmVlIVKlNXaNep0lFdz7qVAcfX2UpeH160vQPVehutKUDW9MJ74O0cGaLCagFZ1mgCEGj 4/tEYWwjHmu8swroYUFN6m0pM7fCTokfhaVQ0lDqiiHg1Mu2WOFeGGwSLq3AXfolo53Pm4C6yxdOR sv1sj5KvQ==; Received: from 80-109-164-210.cable.dynamic.surfer.at ([80.109.164.210] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fJia6-000067-Vp; Fri, 18 May 2018 16:50:15 +0000 From: Christoph Hellwig To: linux-xfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 34/34] xfs: allow writeback on pages without buffer heads Date: Fri, 18 May 2018 18:48:30 +0200 Message-Id: <20180518164830.1552-35-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180518164830.1552-1-hch@lst.de> References: <20180518164830.1552-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Disable the IOMAP_F_BUFFER_HEAD flag on file systems with a block size equal to the page size, and deal with pages without buffer heads in writeback. Thanks to the previous refactoring this is basically trivial now. Signed-off-by: Christoph Hellwig --- fs/xfs/xfs_aops.c | 47 +++++++++++++++++++++++++++++++++------------- fs/xfs/xfs_iomap.c | 3 ++- 2 files changed, 36 insertions(+), 14 deletions(-) diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 492f4a4b1deb..efa2cbb27d67 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -91,6 +91,19 @@ xfs_find_daxdev_for_inode( return mp->m_ddev_targp->bt_daxdev; } +static void +xfs_finish_page_writeback( + struct inode *inode, + struct bio_vec *bvec, + int error) +{ + if (error) { + SetPageError(bvec->bv_page); + mapping_set_error(inode->i_mapping, -EIO); + } + end_page_writeback(bvec->bv_page); +} + /* * We're now finished for good with this page. Update the page state via the * associated buffer_heads, paying attention to the start and end offsets that @@ -103,7 +116,7 @@ xfs_find_daxdev_for_inode( * and buffers potentially freed after every call to end_buffer_async_write. */ static void -xfs_finish_page_writeback( +xfs_finish_buffer_writeback( struct inode *inode, struct bio_vec *bvec, int error) @@ -178,9 +191,12 @@ xfs_destroy_ioend( next = bio->bi_private; /* walk each page on bio, ending page IO on them */ - bio_for_each_segment_all(bvec, bio, i) - xfs_finish_page_writeback(inode, bvec, error); - + bio_for_each_segment_all(bvec, bio, i) { + if (page_has_buffers(bvec->bv_page)) + xfs_finish_buffer_writeback(inode, bvec, error); + else + xfs_finish_page_writeback(inode, bvec, error); + } bio_put(bio); } @@ -792,13 +808,16 @@ xfs_writepage_map( { LIST_HEAD(submit_list); struct xfs_ioend *ioend, *next; - struct buffer_head *bh; + struct buffer_head *bh = NULL; ssize_t len = i_blocksize(inode); int error = 0; int count = 0; loff_t file_offset; /* file offset of page */ unsigned poffset; /* offset into page */ + if (page_has_buffers(page)) + bh = page_buffers(page); + /* * Walk the blocks on the page, and we we run off then end of the * current map or find the current map invalid, grab a new one. @@ -807,11 +826,9 @@ xfs_writepage_map( * replace the bufferhead with some other state tracking mechanism in * future. */ - file_offset = page_offset(page); - bh = page_buffers(page); - for (poffset = 0; + for (poffset = 0, file_offset = page_offset(page); poffset < PAGE_SIZE; - poffset += len, file_offset += len, bh = bh->b_this_page) { + poffset += len, file_offset += len) { /* past the range we are writing, so nothing more to write. */ if (file_offset >= end_offset) break; @@ -819,9 +836,10 @@ xfs_writepage_map( /* * Block does not contain valid data, skip it. */ - if (!buffer_uptodate(bh)) { + if (bh && !buffer_uptodate(bh)) { if (PageUptodate(page)) ASSERT(buffer_mapped(bh)); + bh = bh->b_this_page; continue; } @@ -846,10 +864,15 @@ xfs_writepage_map( * meaningless for holes (!mapped && uptodate), so check we did * have a buffer covering a hole here and continue. */ + if (bh) + bh = bh->b_this_page; continue; } - xfs_map_at_offset(inode, bh, &wpc->imap, file_offset); + if (bh) { + xfs_map_at_offset(inode, bh, &wpc->imap, file_offset); + bh = bh->b_this_page; + } xfs_add_to_ioend(inode, file_offset, page, wpc, wbc, &submit_list); count++; @@ -949,8 +972,6 @@ xfs_do_writepage( trace_xfs_writepage(inode, page, 0, 0); - ASSERT(page_has_buffers(page)); - /* * Refuse to write the page out if we are called from reclaim context. * diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index f949f0dd7382..93c40da3378a 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -1031,7 +1031,8 @@ xfs_file_iomap_begin( if (XFS_FORCED_SHUTDOWN(mp)) return -EIO; - iomap->flags |= IOMAP_F_BUFFER_HEAD; + if (i_blocksize(inode) < PAGE_SIZE) + iomap->flags |= IOMAP_F_BUFFER_HEAD; if (((flags & (IOMAP_WRITE | IOMAP_DIRECT)) == IOMAP_WRITE) && !IS_DAX(inode) && !xfs_get_extsz_hint(ip)) {