Re: [PATCH 2/2] xfs: mark the xfs-alloc workqueue as high priority

Eric Sandeen
2015-01-13T22:58:36Z

On 1/13/15 2:46 PM, Tejun Heo wrote:

> So,
>
> nr_workers == 15,
> nr_idle == 0,
> nr_running == 0,
>
> That means one worker must be playing the role of manager by executing
> manage_workers() whic his also responsible for kicking off the
> rescuers if it fails to create new workers in a short period of time.
> The manager is identifier as the holder of pool->manager_arb and while
> a manager is trying to creat a worker, pool->mayday_timer must be
> armed continuously firing off every MAYDAY_INTERVAL summoning rescuers
> to the pool, which should be visible through the pool_pwq->mayday_node
> corresponding to the stalled pool being queued on wq->maydays.
>
> Can you post the full dump of the pool, wq and all kworkers?
>
> Thanks.
>

Just for mailing list archive posterity, Tejun thinks he's found the culprit
in the workqueue code, I or he can follow up again when he has a patch ready
to go.

Thanks Tejun!

-Eric