Re: [PATCH 9/9] sched/psi: add PSI_IRQ to track IRQ/SOFTIRQ pressure

Johannes Weiner
2022-07-27T13:00:39Z

On Wed, Jul 27, 2022 at 07:28:37PM +0800, Chengming Zhou wrote:
> On 2022/7/26 02:26, Johannes Weiner wrote:
> > I think we can remove the NR_CPU task count, which frees up one
> > u32. Something like the below diff should work (untested!)
>
> Hi, I tested ok, would you mind if I put this patch in this series?
>
> Subject: [PATCH] sched/psi: remove NR_ONCPU task accounting
>
> We put all fields updated by the scheduler in the first cacheline of
> struct psi_group_cpu for performance.
>
> Since we want add another PSI_IRQ_FULL to track IRQ/SOFTIRQ pressure,
> we need to reclaim space first. This patch remove NR_ONCPU task accounting
> in struct psi_group_cpu, use TSK_ONCPU in state_mask to track instead.

Thanks for testing it, that sounds good.

> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> Reviewed-by: Chengming Zhou <zhouchengming@bytedance.com>
> Tested-by: Chengming Zhou <zhouchengming@bytedance.com>

Since you're handling the patch, you need to add your own
Signed-off-by: as well. And keep From: Johannes (git commit --author).

Thanks!