On 8/14/18 9:57 AM, Ming Lei wrote:
> On wbt invariant is that if one IO is tracked via WBT_TRACKED, rqw->inflight
> should be updated for tracking this IO.
>
> But commit c1c80384c8f ("block: remove external dependency on wbt_flags")
> forgets to remove the early handling of !rwb_enabled(rwb) inside wbt_wait(),
> then the inflight counter may not be increased in wbt_wait(), but decreased
> in wbt_done() for this kind of IO, so this counter may become negative, then
> wbt_wait() may wait forever.
>
> This patch fixes the report in the following link:
>
> https://marc.info/?l=linux-block&m=153221542021033&w=2
Looks good to me, thanks for fixing this. Applied.
--
Jens Axboe
