From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755092AbcAWURO (ORCPT ); Sat, 23 Jan 2016 15:17:14 -0500 Received: from mail.kernel.org ([198.145.29.136]:34923 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754956AbcAWURK (ORCPT ); Sat, 23 Jan 2016 15:17:10 -0500 From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Cc: Jaegeuk Kim Subject: [PATCH 4/4] f2fs: use writepages->lock for WB_SYNC_ALL Date: Sat, 23 Jan 2016 12:16:46 -0800 Message-Id: <1453580206-61937-4-git-send-email-jaegeuk@kernel.org> X-Mailer: git-send-email 2.6.3 In-Reply-To: <1453580206-61937-1-git-send-email-jaegeuk@kernel.org> References: <1453580206-61937-1-git-send-email-jaegeuk@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If there are many writepages calls by multiple threads in background, we don't need to serialize to merge all the bios, since it's background. In such the case, it'd better to run writepages concurrently. Signed-off-by: Jaegeuk Kim --- 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 7d9f1d9..8d0d9ec 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1403,7 +1403,7 @@ static int f2fs_write_data_pages(struct address_space *mapping, diff = nr_pages_to_write(sbi, DATA, wbc); - if (!S_ISDIR(inode->i_mode)) { + if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL) { mutex_lock(&sbi->writepages); locked = true; } -- 2.6.3