From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 3286A7F53 for ; Fri, 13 Jun 2014 18:56:32 -0500 (CDT) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay2.corp.sgi.com (Postfix) with ESMTP id 1D15D304048 for ; Fri, 13 Jun 2014 16:56:28 -0700 (PDT) Received: from ipmail06.adl2.internode.on.net (ipmail06.adl2.internode.on.net [150.101.137.129]) by cuda.sgi.com with ESMTP id E0XQQkaSzLHHa568 for ; Fri, 13 Jun 2014 16:56:26 -0700 (PDT) Date: Sat, 14 Jun 2014 09:56:22 +1000 From: Dave Chinner Subject: Re: [PATCH v2] xfs: Fix rounding in xfs_alloc_fix_len() Message-ID: <20140613235622.GA9508@dastard> References: <1401900833-25485-1-git-send-email-jack@suse.cz> <20140604184440.GC55624@bfoster.bfoster> <20140613150207.GA24615@quack.suse.cz> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20140613150207.GA24615@quack.suse.cz> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Jan Kara Cc: Brian Foster , xfs@oss.sgi.com, dchinner@redhat.com On Fri, Jun 13, 2014 at 05:02:07PM +0200, Jan Kara wrote: > On Wed 04-06-14 14:44:40, Brian Foster wrote: > > On Wed, Jun 04, 2014 at 06:53:53PM +0200, Jan Kara wrote: > > > Rounding in xfs_alloc_fix_len() is wrong. As the comment states, the > > > result should be a number of a form (k*prod+mod) however due to sign > > > mistake the result is different. As a result allocations on raid arrays > > > could be misaligned in some cases. > > > > > > This also seems to fix occasional assertion failure: > > > XFS_WANT_CORRUPTED_GOTO(rlen <= flen, error0) > > > in xfs_alloc_ag_vextent_size(). > > > > > > Also add an assertion that the result of xfs_alloc_fix_len() is of > > > expected form. > > > > > > Signed-off-by: Jan Kara > > > --- > > > > Looks good to me. Thanks Jan. > > > > Reviewed-by: Brian Foster > Ping Dave? Are you going to pick up this patch? I did - it's already in Linus' tree for 3.16: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/fs/xfs/xfs_alloc.c?id=30265117ee1e23fa91920f337a3ea91207f700dc Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs