Re: SCSI regression

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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




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