From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.virtall.com ([178.63.195.102]:35007 "EHLO mail.virtall.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753459AbcHELmQ (ORCPT ); Fri, 5 Aug 2016 07:42:16 -0400 Received: from localhost (localhost [127.0.0.1]) by mailext.virtall.com (Postfix) with ESMTP id D716925FA7 for ; Fri, 5 Aug 2016 13:42:12 +0200 (CEST) Received: from mailext.virtall.com ([127.0.0.1]) by localhost (web1.virtall.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0C1r5y4NG-Qy for ; Fri, 5 Aug 2016 13:42:12 +0200 (CEST) Received: from admin.virtall.com (localhost [127.0.0.1]) by mailext.virtall.com (Postfix) with ESMTP for ; Fri, 5 Aug 2016 13:42:12 +0200 (CEST) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Date: Fri, 05 Aug 2016 20:42:12 +0900 From: Tomasz Chmielewski To: linux-btrfs Subject: Input/output error, nothing appended in dmesg Message-ID: Sender: linux-btrfs-owner@vger.kernel.org List-ID: I'm getting occasional (every few weeks) input/output errors on a btrfs filesystem with compress-force=zlib, running on Amazon EC2, with 4.5.2 kernel: # cat 2016-08-02/serverX/syslog.log cat: 2016-08-02/serverX/syslog.log: Input/output error Strangely, nothing gets appended in dmesg: # dmesg -c # The filesystem stores mostly remote syslog files (so, all text files, appended to). Expected? # btrfs fi show /var/log/remote/ Label: none uuid: 5cec93a8-7894-41f6-94a4-9d9b58216dd4 Total devices 1 FS bytes used 146.55GiB devid 1 size 200.00GiB used 153.01GiB path /dev/xvdb # btrfs fi df /var/log/remote/ Data, single: total=149.00GiB, used=144.50GiB System, single: total=4.00MiB, used=48.00KiB Metadata, single: total=4.01GiB, used=2.05GiB GlobalReserve, single: total=512.00MiB, used=0.00B Tomasz Chmielewski https://lxadm.com