On 8/24/18 4:20 PM, Jens Axboe wrote: > Hi, > > Was testing other things today, but ended up with this: > > # echo "write through" > /sys/block/sde/device/scsi_disk/4:0:0:0/cache_type > > hanging. Looking closer, the request is successfully queued and the > caller is waiting on rq execution and completion, but the request is > sitting in the hctx->dispatch list and is continually being attempted > issued, but gets a BLK_STS_RESOURCE return. > > The problematic commit is: > > commit 328728630d9f2bf14b82ca30b5e47489beefe361 > Author: Ming Lei <ming.lei@xxxxxxxxxx> > Date: Sun Jun 24 22:03:27 2018 +0800 > > scsi: core: avoid host-wide host_busy counter for scsi_mq > > so I'm guessing it's some one-off or similar. I won't have more time > to look into this today, so might have to wait until Monday. Forgot to mention that this is with scsi-mq enabled. -- Jens Axboe
