Re: [PATCH V3 7/7] workqueue: Process extra works in rescuer when there are no more to rescue

[Tejun Heo]

Hello,

On Sat, Nov 22, 2025 at 03:07:25PM +0800, Lai Jiangshan wrote:
...
> But this patch does not really check if memory pressure is still on,
> using (pool->flags & POOL_MANAGER_ACTIVE) can kind of
> achieve it, though not precisely. There is never a precise way,
> but the system has poured some resources to create the rescuer,
> it is better to make the best use of it, like before patch 2/7.
> 
> this patch:
>        if (!pwq->nr_active)
>                 return false;
>        if (!need_to_create_worker(pool)) {
>                if (limited || !list_empty(&pwq->wq->maydays))
>                        return false;
>        }
> 
> with memory pressure test via POOL_MANAGER_ACTIVE:
> 
>        if (!pwq->nr_active)
>                 return false;
>        if (!need_to_create_worker(pool)) {
>                if (limited || !(pool->flags & POOL_MANAGER_ACTIVE) ||
> !list_empty(&pwq->wq->maydays))
>                        return false;
>        }
> 
> What do you think?

Yeah, POOL_MANAGER_ACTIVE seems like a more reliable condition to test.
Let's do that.

Thanks.

-- 
tejun