From patchwork Fri Jun 16 19:34:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 9793663 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 C656760325 for ; Fri, 16 Jun 2017 19:38:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B6E35285D1 for ; Fri, 16 Jun 2017 19:38:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AB7812863A; Fri, 16 Jun 2017 19:38:42 +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 66E56285D1 for ; Fri, 16 Jun 2017 19:38:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752269AbdFPTfW (ORCPT ); Fri, 16 Jun 2017 15:35:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34974 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752044AbdFPTfT (ORCPT ); Fri, 16 Jun 2017 15:35:19 -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 44405C0587DE; Fri, 16 Jun 2017 19:35:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 44405C0587DE Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=jlayton@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 44405C0587DE Received: from tleilax.poochiereds.net (ovpn-120-225.rdu2.redhat.com [10.10.120.225]) by smtp.corp.redhat.com (Postfix) with ESMTP id 33BC4173B2; Fri, 16 Jun 2017 19:35:08 +0000 (UTC) From: Jeff Layton To: Andrew Morton , Al Viro , Jan Kara , tytso@mit.edu, axboe@kernel.dk, mawilcox@microsoft.com, ross.zwisler@linux.intel.com, corbet@lwn.net, Chris Mason , Josef Bacik , David Sterba , "Darrick J . Wong" Cc: Carlos Maiolino , Eryu Guan , David Howells , Christoph Hellwig , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-block@vger.kernel.org Subject: [PATCH v7 06/22] mm: clear AS_EIO/AS_ENOSPC when writeback initiation fails Date: Fri, 16 Jun 2017 15:34:11 -0400 Message-Id: <20170616193427.13955-7-jlayton@redhat.com> In-Reply-To: <20170616193427.13955-1-jlayton@redhat.com> References: <20170616193427.13955-1-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 [10.5.110.32]); Fri, 16 Jun 2017 19:35:19 +0000 (UTC) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP filemap_write_and_wait{_range} will return an error if writeback initiation fails, but won't clear errors in the address_space. This is particularly problematic on DAX, as it's effectively synchronous. Ensure that we clear the AS_EIO/AS_ENOSPC flags when filemap_fdatawrite returns an error. Signed-off-by: Jeff Layton --- mm/filemap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/mm/filemap.c b/mm/filemap.c index 37f286df7c95..c349a5d3a34b 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -517,6 +517,9 @@ int filemap_write_and_wait(struct address_space *mapping) int err2 = filemap_fdatawait(mapping); if (!err) err = err2; + } else { + /* Clear any previously stored errors */ + filemap_check_errors(mapping); } } else { err = filemap_check_errors(mapping); @@ -551,6 +554,9 @@ int filemap_write_and_wait_range(struct address_space *mapping, lstart, lend); if (!err) err = err2; + } else { + /* Clear any previously stored errors */ + filemap_check_errors(mapping); } } else { err = filemap_check_errors(mapping);