From patchwork Sat Mar 12 00:14:37 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaegeuk Kim X-Patchwork-Id: 8570551 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id C0EC9C0553 for ; Sat, 12 Mar 2016 00:15:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 021D42035E for ; Sat, 12 Mar 2016 00:15:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 29B382035D for ; Sat, 12 Mar 2016 00:15:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753174AbcCLAOx (ORCPT ); Fri, 11 Mar 2016 19:14:53 -0500 Received: from mail.kernel.org ([198.145.29.136]:44391 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753128AbcCLAOm (ORCPT ); Fri, 11 Mar 2016 19:14:42 -0500 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CEAA52034C; Sat, 12 Mar 2016 00:14:40 +0000 (UTC) Received: from localhost (107-1-141-74-ip-static.hfc.comcastbusiness.net [107.1.141.74]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1E4882035E; Sat, 12 Mar 2016 00:14:40 +0000 (UTC) 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 2/2] f2fs: avoid writepage lock when many threads call fsync Date: Fri, 11 Mar 2016 16:14:37 -0800 Message-Id: <1457741677-67046-2-git-send-email-jaegeuk@kernel.org> X-Mailer: git-send-email 2.6.3 In-Reply-To: <1457741677-67046-1-git-send-email-jaegeuk@kernel.org> References: <1457741677-67046-1-git-send-email-jaegeuk@kernel.org> X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP If many threads try to write small number of data and fsync, we should avoid writepages lock contention. Signed-off-by: Jaegeuk Kim --- fs/f2fs/data.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index e5c762b..fb75699 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1400,7 +1400,8 @@ static int f2fs_write_data_pages(struct address_space *mapping, diff = nr_pages_to_write(sbi, DATA, wbc); - if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL) { + if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL && + !is_inode_flag_set(F2FS_I(inode), FI_NEED_IPU)) { mutex_lock(&sbi->writepages); locked = true; }