On 5/8/18 2:37 PM, Jens Axboe wrote: > On 5/8/18 10:42 AM, Mike Galbraith wrote: >> On Tue, 2018-05-08 at 08:55 -0600, Jens Axboe wrote: >>> >>> All the block debug files are empty... >> >> Sigh. Take 2, this time cat debug files, having turned block tracing >> off before doing anything else (so trace bits in dmesg.txt should end >> AT the stall). > > OK, that's better. What I see from the traces: > > - You have regular IO and some non-fs IO (from scsi_execute()). This mix > may be key. > > - sdd has nothing pending, yet has 6 active waitqueues. > > I'm going to see if I can reproduce this. Paolo, what kind of attempts > to reproduce this have you done? No luck so far. Out of the patches you referenced, I can only find the shallow depth change, since that's in the parent of this email. Can you send those as well? Perhaps also expand a bit on exactly what you are running. File system, mount options, etc. -- Jens Axboe
