From patchwork Sat Jul 15 01:22:45 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaegeuk Kim X-Patchwork-Id: 9841883 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 DECE660384 for ; Sat, 15 Jul 2017 01:22:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CEBAC287C7 for ; Sat, 15 Jul 2017 01:22:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C38F5287E1; Sat, 15 Jul 2017 01:22:48 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham 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 6CFAC287CE for ; Sat, 15 Jul 2017 01:22:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751142AbdGOBWr (ORCPT ); Fri, 14 Jul 2017 21:22:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:47736 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751118AbdGOBWq (ORCPT ); Fri, 14 Jul 2017 21:22:46 -0400 Received: from localhost (unknown [104.132.0.95]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4A96D22D3B; Sat, 15 Jul 2017 01:22:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A96D22D3B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=jaegeuk@kernel.org 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] f2fs: avoid cpu lockup Date: Fri, 14 Jul 2017 18:22:45 -0700 Message-Id: <20170715012245.24640-1-jaegeuk@kernel.org> X-Mailer: git-send-email 2.13.0.rc1.294.g07d810a77f-goog 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 Before retrying to flush data or dentry pages, we need to release cpu in order to prevent watchdog. Signed-off-by: Jaegeuk Kim --- fs/f2fs/checkpoint.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index 56bbf592e487..c96913c56f6c 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -909,8 +909,11 @@ int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type) * wribacking dentry pages in the freeing inode. */ f2fs_submit_merged_write(sbi, DATA); - cond_resched(); } + /* We need to give a chance to get cpu for user file writers. */ + if (!is_dir) + congestion_wait(BLK_RW_ASYNC, HZ/50); + cond_resched(); goto retry; }