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From: Johannes Weiner <hannes@cmpxchg.org>
To: Chengming Zhou <zhouchengming@bytedance.com>
Cc: surenb@google.com, mingo@redhat.com, peterz@infradead.org,
	tj@kernel.org, corbet@lwn.net, akpm@linux-foundation.org,
	rdunlap@infradead.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, songmuchun@bytedance.com,
	cgroups@vger.kernel.org
Subject: Re: [PATCH 9/9] sched/psi: add PSI_IRQ to track IRQ/SOFTIRQ pressure
Date: Wed, 27 Jul 2022 09:00:27 -0400	[thread overview]
Message-ID: <YuE26+jMjnE4GZZ2@cmpxchg.org> (raw)
In-Reply-To: <5f91e194-439a-12c0-4987-5dea0e68a60a@bytedance.com>

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!

  reply	other threads:[~2022-07-27 13:00 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-21  4:04 [PATCH 0/9] sched/psi: some optimization and extension Chengming Zhou
2022-07-21  4:04 ` [PATCH 1/9] sched/psi: fix periodic aggregation shut off Chengming Zhou
2022-07-25 15:34   ` Johannes Weiner
2022-07-25 15:39   ` Johannes Weiner
2022-07-26 13:28     ` Chengming Zhou
2022-07-21  4:04 ` [PATCH 2/9] sched/psi: optimize task switch inside shared cgroups again Chengming Zhou
2022-07-21  4:04 ` [PATCH 3/9] sched/psi: move private helpers to sched/stats.h Chengming Zhou
2022-07-25 16:39   ` Johannes Weiner
2022-07-21  4:04 ` [PATCH 4/9] sched/psi: don't change task psi_flags when migrate CPU/group Chengming Zhou
2022-07-21  4:04 ` [PATCH 5/9] sched/psi: don't create cgroup PSI files when psi_disabled Chengming Zhou
2022-07-25 16:41   ` Johannes Weiner
2022-07-21  4:04 ` [PATCH 6/9] sched/psi: save percpu memory when !psi_cgroups_enabled Chengming Zhou
2022-07-25 16:47   ` Johannes Weiner
2022-07-21  4:04 ` [PATCH 7/9] sched/psi: cache parent psi_group to speed up groups iterate Chengming Zhou
2022-07-21  4:04 ` [PATCH 8/9] sched/psi: add kernel cmdline parameter psi_inner_cgroup Chengming Zhou
2022-07-25 16:52   ` Johannes Weiner
2022-07-26 13:38     ` [External] " Chengming Zhou
2022-07-26 17:54     ` Tejun Heo
2022-08-03 12:17       ` Chengming Zhou
2022-08-03 17:58         ` Tejun Heo
2022-08-03 19:22           ` Johannes Weiner
2022-08-03 19:48             ` Tejun Heo
2022-08-04 13:51             ` Chengming Zhou
2022-08-04 16:56               ` Johannes Weiner
2022-08-04  2:02           ` Chengming Zhou
2022-07-21  4:04 ` [PATCH 9/9] sched/psi: add PSI_IRQ to track IRQ/SOFTIRQ pressure Chengming Zhou
2022-07-21 10:00   ` kernel test robot
2022-07-21 22:10   ` kernel test robot
2022-07-22  3:30   ` Abel Wu
2022-07-22  6:13     ` Chengming Zhou
2022-07-22  7:14       ` Abel Wu
2022-07-22  7:33         ` Chengming Zhou
2022-07-25 18:26   ` Johannes Weiner
2022-07-26 13:55     ` [External] " Chengming Zhou
2022-07-27 11:28     ` Chengming Zhou
2022-07-27 13:00       ` Johannes Weiner [this message]
2022-07-27 15:09         ` Chengming Zhou
2022-07-27 16:07   ` Peter Zijlstra

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