From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: Re: Kernel deadlock during mdadm reshape Date: Wed, 27 Jul 2016 17:04:59 -0700 Message-ID: <1a648537-e31e-875b-642b-b68ff83a32f6@sandisk.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Michael Shaver , mdraid List-Id: linux-raid.ids On 07/26/2016 07:18 PM, Michael Shaver wrote: > I am experiencing the exact same problem reported in this thread: > > http://www.spinics.net/lists/raid/msg52235.html > > Also reported here: > > https://forums.gentoo.org/viewtopic-t-1043706.html > > And here: > > https://bbs.archlinux.org/viewtopic.php?id=212108 > > I have a raid5 array of 2TB disks currently stuck at 94% of a mdadm > reshape squeal to a grow operation from 4 disks to 5. In my case, I did > have a drive drop out of the array during the reshape. > > [ ... ] > [] truncate_inode_pages_range+0x46d/0x880 > [] truncate_inode_pages+0x15/0x20 > [ ... ] Hello Michael, I ran into a similar lockup while retesting the dm-mpath driver. So we either ran into a different lockup or the lockup was not related to the md driver. Were you using a distro kernel or a kernel you built yourself? Anyway, was THP (transparent huge page) support enabled? If so, can you repeat your test with THP support disabled and see whether that makes a difference? Thanks, Bart.