On Thu, Aug 23, 2018 at 09:15:27AM -0600, Jens Axboe wrote:
> A previous commit removed the ability to have per-rq flags. We used
> those flags to maintain inflight counts. Since we don't have those
> anymore, we have to always maintain inflight counts, even if wbt is
> disabled. This is clearly suboptimal.
>
> Add a queue quiesce around changing the wbt latency settings from sysfs
> to work around this. With that, we can reliably put the enabled check in
> our bio_to_wbt_flags(), since we know the WBT_TRACKED flag will be
> consistent for the lifetime of the request.
>
> Fixes: Fixes: c1c80384c8f ("block: remove external dependency on wbt_flags")
> Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
>
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
Sorry about that,
Josef
