From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shaohua Li Subject: Re: Problem with array raid10 array resync on 4.4.0 (keeps reyncing each reboot) Date: Thu, 28 Jan 2016 10:25:22 -0800 Message-ID: <20160128182522.GB23378@kernel.org> References: <56A78786.10103@Free.fr> <20160126233133.GB12721@kernel.org> <56A870AD.4070400@free.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <56A870AD.4070400@free.fr> Sender: linux-raid-owner@vger.kernel.org To: Eric Valette Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Wed, Jan 27, 2016 at 08:24:29AM +0100, Eric Valette wrote: > On 27/01/2016 00:31, Shaohua Li wrote: > >On Tue, Jan 26, 2016 at 03:49:42PM +0100, Eric Valette wrote: > >>Hi, > >> > >>My raid 10 array (5 disk with one spare) was doing a resync after an > >>upgrade to 4.4.0 from 4.1.15. The resync progress was steady and at the end > >>the /proc/mdstat was apparently complete but when rebooting, it started > >>resycing over and over. I noticed my dmesg was totally filled with raid10 > >>conf printout message so it was impossible to trace anything else. > >> > >>Did a resync test with 3.14.58 (because I knew it had worked for resync > >>before and was still available as a boot option) and the array was > >>correctly rebuild. > >>Runs fine with 4.1.16 now. > >> > >>Please CC me as I'm not subscribed. > > > >Could you please provide more info, like mdadm -D /dev/md0 in v4.4? If you run > >a stop/reassemble, does the resync start? > > I'm not going to retry kernel 4.4.0 on this device as I'm no more confident > about raid10 support with this 4.4 version. Thanks! I know switching to a kernel which is not working well is risky, but the info from 4.1 doesn't have enough info for debuging. I also tried to reproduce the issue locally, but no success. Did you have any other info which could help debugging, for example special config? Thanks, Shaohua