From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Chinner Subject: Re: interesting MD-xfs bug Date: Fri, 10 Apr 2015 08:53:22 +1000 Message-ID: <20150409225322.GH13731@dastard> References: <5526E8E9.3030805@gmail.com> <20150409221846.GG13731@dastard> <5526FB2A.8060704@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <5526FB2A.8060704@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Joe Landman Cc: xfs , linux-raid List-Id: linux-raid.ids On Thu, Apr 09, 2015 at 06:20:26PM -0400, Joe Landman wrote: > > > On 04/09/2015 06:18 PM, Dave Chinner wrote: > >On Thu, Apr 09, 2015 at 05:02:33PM -0400, Joe Landman wrote: > >>If I build an MD raid0 with a non power of 2 chunk size, it appears > >>that I can mkfs.xfs a file system, but it doesn't show up in blkid > >>and is not mountable. Yet, using a power of 2 chunk size, this does > >>work correctly. This is kernel 3.18.9. > >> > > [...] > > >That looks more like a blkid or udev problem. try using blkid -p so > >that it doesn't look up the cache but directly probes devices for > >the signatures. strace might tell you a bit more, too. And if the > >filesystem mounts, then it definitely isn't an XFS problem ;) > > Thats the thing, it didn't mount, even when I used the device name > directly. Ok, that's interesting. Let me see if I can reproduce it locally. If you don't hear otherwise, tracing would still be useful. Thanks for the bug report, Joe. Cheers, Dave. -- Dave Chinner david@fromorbit.com