From: Ted Ts'o Subject: Re: errors in ext4_mb_generate_buddy and ext4_remount Date: Sun, 8 May 2011 21:01:12 -0400 Message-ID: <20110509010112.GC4138@thunk.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org To: Christoph Anton Mitterer Return-path: Received: from li9-11.members.linode.com ([67.18.176.11]:34334 "EHLO test.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756285Ab1EIBBP (ORCPT ); Sun, 8 May 2011 21:01:15 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Sun, May 08, 2011 at 12:56:19AM +0000, Christoph Anton Mitterer wrote: > > However, I constantly get these errors: > [ 331.744025] EXT4-fs (dm-2): error count: 10 > [ 331.744030] EXT4-fs (dm-2): initial error at 1304673122: > ext4_mb_generate_buddy:731 > [ 331.744034] EXT4-fs (dm-2): last error at 1304673124: ext4_remount:4250 > ... (probably) when reading some files. I guess it's reading files, at > least it happens during a debsums run (checks the package sums of more or > less all Debian packages installed). > Also the numbers in the errors above, are (at least until know, and as far > as I looked after it) the same. > > It also happens (as far as I can see) only once, i.e. if the error has > already occurred, and I do e.g. my debsums again, it's not printed again. > > fsck runs through fine (but quite quick; yes - of course - I've used -f) > > Any ideas? (Please CC me as I'm off list). Kernels 2.6.35 and newer will set superblock fields that will result in those messages. They're not error messages per se; it's just a notification that there was an file system error in the past that hasn't been fixed yet. In your case, it *has* been fixed, but you don't have a new enough version of e2fsprogs so that it clears the relevant parts of the superblock. The debian packages of e2fsprogs version 1.41.14-1 in experimental, or 1.41.12-4 in unstable, has the necessary new code in e2fsck. I'm working on getting the patch pushed to Debian obsolete^H^H^H^H^H^H^H stable; hopefully that will happen in the next week or two. - Ted