On 1/12/18 2:19 PM, Bart Van Assche wrote: > On Fri, 2018-01-12 at 14:07 -0700, Jens Axboe wrote: >> You're really not making it easy for folks to run this :-) > > My hope is that the ib_srp and ib_srpt patches will be accepted upstream soon. > As long as these are not upstream, anyone who wants to retrieve these patches > is welcome to clone https://github.com/bvanassche/linux/tree/block-scsi-for-next, > a kernel tree with all my pending patches. > >> Do you have the matching blk-mq debugfs output for the device? > > Sorry but I only retrieved the blk-mq debugfs several minutes after the hang > started so I'm not sure the state information is relevant. Anyway, I have attached > it to this e-mail. The most remarkable part is the following: > > ./000000009ddfa913/requeue_list:000000009646711c {.op=READ, .state=idle, gen=0x1 > 18, abort_gen=0x0, .cmd_flags=, .rq_flags=SORTED|1|SOFTBARRIER|IO_STAT, complete > =0, .tag=-1, .internal_tag=217} Two things come to mind here: 1) We forgot to add RQF_STARTED to the debugfs bits, I just rectified that. 2) You are using a scheduler (which one?). The request was inserted, and retrieved by the driver, then requeued. After this requeue, apparently nothing happened. The queue should have been re-run, but that didn't happen. What are the queue/hctx states? -- Jens Axboe
