On Wed, Nov 28, 2018 at 09:39:44PM -0500, Martin K. Petersen wrote: > > Ming, > > > On Wed, Nov 28, 2018 at 11:08:48AM +0100, Christoph Hellwig wrote: > >> On Wed, Nov 28, 2018 at 06:07:01PM +0800, Ming Lei wrote: > >> > > Is this the nvme target on top of null_blk? > >> > > >> > Yes. > >> > >> And it goes away if you revert just the last patch? > > > > Today I run this test again and can't reproduce it any more. > > > > So maybe not a new issue, and it is just triggered in yesterday's > > for-4.21/block, :-) > > Can you reproduce with yesterday's tree then? > > I'm obviously a bit concerned about merging something without knowing > the cause of the problems you were seeing. Hi Martin, The panic is triggered on my auto daily test on yesterday's for-4.21/block. It isn't triggered in today's for-4.21/block. Also not triggered any more when I run same test again on yesterday's for-4.21/block(5f0ed774ed29). Thanks, Ming