Messages in this thread | | | Subject | Re: bug in tag handling in blk-mq? | From | Jens Axboe <> | Date | Tue, 8 May 2018 14:37:52 -0600 |
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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?
-- Jens Axboe
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