On 2018/08/06 20:56, Tetsuo Handa wrote: > On 2018/08/06 19:09, Jan Kara wrote: >> Looks like some kind of a race where device block size gets changed while >> getblk() runs (and creates buffers for underlying page). I don't have time >> to nail it down at this moment can have a look into it later unless someone >> beats me to it. >> > > It seems that loop device is relevant to this problem. Speak of loop device, I'm waiting for Jens for three months http://lkml.kernel.org/r/1527297408-4428-1-git-send-email-penguin-kernel@xxxxxxxxxxxxxxxxxxx but Jens is too busy to come up with an alternative. Since that is a big patch, I wish we can start testing that patch before Jan starts writing a patch for fixing getblk() race problem.
