From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB61CC433DF for ; Mon, 24 Aug 2020 08:34:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C6212075B for ; Mon, 24 Aug 2020 08:34:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598258041; bh=7MMjWtjppeUjXZn3kegXmGywdbugRJzfUujLOMhLPcM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=deEpTYqy6esPVGHnvt8BQHjb0E/2eF8AJCmcagE6oUSmmmTiaphcWGRjY4adgp7LO u9Gsux0E63NwkROEeS2PdHS8vLCrrUGn51S8dcZ+d5lkQ3NbxrASMYEVFNHBoI1wPS /CGJlqszGNiN4Y6y1oxQJ6Np4X9nSN7hhJ36Is5E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727828AbgHXIeA (ORCPT ); Mon, 24 Aug 2020 04:34:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:41900 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727816AbgHXId4 (ORCPT ); Mon, 24 Aug 2020 04:33:56 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 C3FFC2075B; Mon, 24 Aug 2020 08:33:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598258036; bh=7MMjWtjppeUjXZn3kegXmGywdbugRJzfUujLOMhLPcM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=p5i91WrfyeaZ5xzcD0qjIxgEuKkmz7cVF8Pq5kt5qpZy/E8WA+LVIN+WyYzk4X4BM Q2mc+omkvFnCoARE99JzPnxIcgXyjM1POAVc8SYqxfis4wB9LfUtLPd7ERL/pWvRhr 5GAK7yDpRl/ibckaQVxUu0ZAh6Cdyamj74Kjl4KQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chao Yu , Jaegeuk Kim , Sasha Levin Subject: [PATCH 5.8 049/148] f2fs: fix to check page dirty status before writeback Date: Mon, 24 Aug 2020 10:29:07 +0200 Message-Id: <20200824082416.420939909@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200824082413.900489417@linuxfoundation.org> References: <20200824082413.900489417@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chao Yu [ Upstream commit eb1353cfa9c1e9415b03dc117f8399969fa02102 ] In f2fs_write_raw_pages(), we need to check page dirty status before writeback, because there could be a racer (e.g. reclaimer) helps writebacking the dirty page. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/compress.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index f6fbe61b1251e..2390f7943f6c8 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1310,6 +1310,12 @@ retry_write: congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT); lock_page(cc->rpages[i]); + + if (!PageDirty(cc->rpages[i])) { + unlock_page(cc->rpages[i]); + continue; + } + clear_page_dirty_for_io(cc->rpages[i]); goto retry_write; } -- 2.25.1