From patchwork Wed Jun 28 15:31:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13295991 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 28DB8C001B0 for ; Wed, 28 Jun 2023 15:33:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232469AbjF1Pdt (ORCPT ); Wed, 28 Jun 2023 11:33:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232259AbjF1PdB (ORCPT ); Wed, 28 Jun 2023 11:33:01 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF21730D3; Wed, 28 Jun 2023 08:32:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=3Vs6HRFrG4S3aq9C96+j6uLPDbL41Vn9nahZIdhyzu4=; b=E6WNPevrPJqOks5BVluWFc33BF 1eRE6ZnxBzV/CFDaBVopI0jmhucFqnPb8yGpmqkUac5ae33RVn03YqTkJin5cYq0/qQfNvP88TCp8 kLlNSnlh1UyIbuGYHSXg7nm30j66a5bZwPyWt4k8r5UOzp7o1oskl4KwAAnbkN0OxZ3VQXs/XHwB+ Ucky5nYrCLlGt1s8+UAEAmr90AKQBlwNYa5KKJZ80DkRwbRWveqmoEvm5+uQ060rHUurJnvAu8fTX Isw1b9cYLKQopAVHTIjgyzlqX6JyQrkC7szjsy+Ti7cD3HKTfBretetxNGawDR3EyA4D9YT0v9RpH 30op/yIw==; Received: from 2a02-8389-2341-5b80-39d3-4735-9a3c-88d8.cable.dynamic.v6.surfer.at ([2a02:8389:2341:5b80:39d3:4735:9a3c:88d8] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1qEXA7-00G0G9-1l; Wed, 28 Jun 2023 15:32:56 +0000 From: Christoph Hellwig To: Chris Mason , Josef Bacik , David Sterba Cc: Matthew Wilcox , linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 21/23] btrfs: don't redirty locked_page in run_delalloc_zoned Date: Wed, 28 Jun 2023 17:31:42 +0200 Message-Id: <20230628153144.22834-22-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230628153144.22834-1-hch@lst.de> References: <20230628153144.22834-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org extent_write_locked_range currently expects that either all or no pages are dirty when it is called. Bur run_delalloc_zoned is called directly in the writepages path, and has the dirty bit cleared only for locked_page and which the extent_write_cache_pages currently operates. It currently works around this by redirtying locked_page, but that is a bit inefficient and cumbersome. Pass a locked_page argument to run_delalloc_zoned so that clearing the dirty bit can be skipped on just that page. Signed-off-by: Christoph Hellwig --- fs/btrfs/extent_io.c | 7 ++++--- fs/btrfs/extent_io.h | 5 +++-- fs/btrfs/inode.c | 13 ++++--------- 3 files changed, 11 insertions(+), 14 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index e74153c02d84c7..efcac0b56b8252 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2133,8 +2133,9 @@ static int extent_write_cache_pages(struct address_space *mapping, * already been ran (aka, ordered extent inserted) and all pages are still * locked. */ -void extent_write_locked_range(struct inode *inode, u64 start, u64 end, - struct writeback_control *wbc, bool pages_dirty) +void extent_write_locked_range(struct inode *inode, struct page *locked_page, + u64 start, u64 end, struct writeback_control *wbc, + bool pages_dirty) { bool found_error = false; int ret = 0; @@ -2161,7 +2162,7 @@ void extent_write_locked_range(struct inode *inode, u64 start, u64 end, page = find_get_page(mapping, cur >> PAGE_SHIFT); ASSERT(PageLocked(page)); - if (pages_dirty) { + if (pages_dirty && page != locked_page) { ASSERT(PageDirty(page)); clear_page_dirty_for_io(page); } diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 2678906e87c506..c01f9c5ddc13c0 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -177,8 +177,9 @@ int try_release_extent_mapping(struct page *page, gfp_t mask); int try_release_extent_buffer(struct page *page); int btrfs_read_folio(struct file *file, struct folio *folio); -void extent_write_locked_range(struct inode *inode, u64 start, u64 end, - struct writeback_control *wbc, bool pages_dirty); +void extent_write_locked_range(struct inode *inode, struct page *locked_page, + u64 start, u64 end, struct writeback_control *wbc, + bool pages_dirty); int extent_writepages(struct address_space *mapping, struct writeback_control *wbc); int btree_write_cache_pages(struct address_space *mapping, diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 2a4b62398ee7a3..ae5166d33253a5 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1105,7 +1105,8 @@ static void submit_uncompressed_range(struct btrfs_inode *inode, /* All pages will be unlocked, including @locked_page */ wbc_attach_fdatawrite_inode(&wbc, &inode->vfs_inode); - extent_write_locked_range(&inode->vfs_inode, start, end, &wbc, false); + extent_write_locked_range(&inode->vfs_inode, NULL, start, end, &wbc, + false); wbc_detach_inode(&wbc); } @@ -1720,7 +1721,6 @@ static noinline int run_delalloc_zoned(struct btrfs_inode *inode, { u64 done_offset = end; int ret; - bool locked_page_done = false; while (start <= end) { ret = cow_file_range(inode, locked_page, start, end, @@ -1728,13 +1728,8 @@ static noinline int run_delalloc_zoned(struct btrfs_inode *inode, if (ret) return ret; - if (!locked_page_done) { - __set_page_dirty_nobuffers(locked_page); - account_page_redirty(locked_page); - } - locked_page_done = true; - extent_write_locked_range(&inode->vfs_inode, start, done_offset, - wbc, true); + extent_write_locked_range(&inode->vfs_inode, locked_page, start, + done_offset, wbc, true); start = done_offset + 1; }