From patchwork Tue May 9 15:49:24 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 9718343 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 E3F7460236 for ; Tue, 9 May 2017 15:54:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D58FF1FF61 for ; Tue, 9 May 2017 15:54:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C85B328304; Tue, 9 May 2017 15:54:59 +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 7CD2B1FF61 for ; Tue, 9 May 2017 15:54:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754585AbdEIPy5 (ORCPT ); Tue, 9 May 2017 11:54:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53608 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755284AbdEIPuq (ORCPT ); Tue, 9 May 2017 11:50:46 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CF6934DB81; Tue, 9 May 2017 15:50:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com CF6934DB81 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=jlayton@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com CF6934DB81 Received: from tleilax.poochiereds.net (ovpn-121-66.rdu2.redhat.com [10.10.121.66]) by smtp.corp.redhat.com (Postfix) with ESMTP id B695317596; Tue, 9 May 2017 15:50:43 +0000 (UTC) From: Jeff Layton To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-mm@kvack.org, jfs-discussion@lists.sourceforge.net, linux-xfs@vger.kernel.org, cluster-devel@redhat.com, linux-f2fs-devel@lists.sourceforge.net, v9fs-developer@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-block@vger.kernel.org Cc: dhowells@redhat.com, akpm@linux-foundation.org, hch@infradead.org, ross.zwisler@linux.intel.com, mawilcox@microsoft.com, jack@suse.com, viro@zeniv.linux.org.uk, corbet@lwn.net, neilb@suse.de, clm@fb.com, tytso@mit.edu, axboe@kernel.dk, josef@toxicpanda.com, hubcap@omnibond.com, rpeterso@redhat.com, bo.li.liu@oracle.com Subject: [PATCH v4 21/27] mm: clean up error handling in write_one_page Date: Tue, 9 May 2017 11:49:24 -0400 Message-Id: <20170509154930.29524-22-jlayton@redhat.com> In-Reply-To: <20170509154930.29524-1-jlayton@redhat.com> References: <20170509154930.29524-1-jlayton@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 09 May 2017 15:50:46 +0000 (UTC) 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 Don't try to check PageError since that's potentially racy and not necessarily going to be set after writepage errors out. Instead, sample the mapping error early on, and use that value to tell us whether we got a writeback error since then. Signed-off-by: Jeff Layton Reviewed-by: Jan Kara --- mm/page-writeback.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index de0dbf12e2c1..1643456881b4 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2373,11 +2373,12 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc) int write_one_page(struct page *page) { struct address_space *mapping = page->mapping; - int ret = 0; + int ret = 0, ret2; struct writeback_control wbc = { .sync_mode = WB_SYNC_ALL, .nr_to_write = 1, }; + errseq_t since = filemap_sample_wb_error(mapping); BUG_ON(!PageLocked(page)); @@ -2386,16 +2387,14 @@ int write_one_page(struct page *page) if (clear_page_dirty_for_io(page)) { get_page(page); ret = mapping->a_ops->writepage(page, &wbc); - if (ret == 0) { + if (ret == 0) wait_on_page_writeback(page); - if (PageError(page)) - ret = -EIO; - } put_page(page); } else { unlock_page(page); } - return ret; + ret2 = filemap_check_wb_error(mapping, since); + return ret ? : ret2; } EXPORT_SYMBOL(write_one_page);