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, :-) Thanks, Ming