From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752131AbcHFUVu (ORCPT ); Sat, 6 Aug 2016 16:21:50 -0400 Received: from mail.kernel.org ([198.145.29.136]:48554 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751856AbcHFUVP (ORCPT ); Sat, 6 Aug 2016 16:21:15 -0400 From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH 2/2] Revert "f2fs: move i_size_write in f2fs_write_end" Date: Sat, 6 Aug 2016 21:09:41 +0800 Message-Id: <1470488981-2469-2-git-send-email-chao@kernel.org> X-Mailer: git-send-email 2.7.2 In-Reply-To: <1470488981-2469-1-git-send-email-chao@kernel.org> References: <1470488981-2469-1-git-send-email-chao@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chao Yu This reverts commit a2ee0a300344a6da76186129b078113354fe13d2. When testing with generic/032 of xfstest suit, failure message will be reported as below: generic/032 8s ... [failed, exit status 1] - output mismatch (see results/generic/032.out.bad) --- tests/generic/032.out 2015-01-11 16:52:27.643681072 +0800 +++ results/generic/032.out.bad 2016-08-06 13:44:43.861330500 +0800 @@ -1,5 +1,5 @@ QA output created by 032 -100 iterations -0000000 cdcd cdcd cdcd cdcd cdcd cdcd cdcd cdcd -* -0100000 +1: [768..775]: unwritten +Unwritten extents found! ... (Run 'diff -u tests/generic/032.out results/generic/032.out.bad' to see the entire diff) Ran: generic/032 Failures: generic/032 Failed 1 of 1 tests In write_end(), we should update i_size of inode before unlock page, otherwise, we will lose newly updated data in following race condition. Thread A Thread B - write_end - unlock page - writepages - lock_page - writepage if page is out-of-range of file size, we will skip writting the page. - update i_size Signed-off-by: Chao Yu --- fs/f2fs/data.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index e262427..5bb0bd2 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1700,11 +1700,11 @@ static int f2fs_write_end(struct file *file, trace_f2fs_write_end(inode, pos, len, copied); set_page_dirty(page); - f2fs_put_page(page, 1); if (pos + copied > i_size_read(inode)) f2fs_i_size_write(inode, pos + copied); + f2fs_put_page(page, 1); f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); return copied; } -- 2.7.2