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From: Johannes Weiner <hannes@cmpxchg.org>
To: peterz@infradead.org
Cc: Chengming Zhou <zhouchengming@bytedance.com>,
	mingo@redhat.com, juri.lelli@redhat.com,
	vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
	rostedt@goodmis.org, linux-kernel@vger.kernel.org,
	songmuchun@bytedance.com
Subject: Re: [PATCH v2 0/4] psi: Add PSI_CPU_FULL state and some code optimization
Date: Wed, 3 Mar 2021 09:59:11 -0500	[thread overview]
Message-ID: <YD+kP0z0yWm9UeDK@cmpxchg.org> (raw)
In-Reply-To: <20210303034659.91735-1-zhouchengming@bytedance.com>

On Wed, Mar 03, 2021 at 11:46:55AM +0800, Chengming Zhou wrote:
> This patch series is RESEND of the previous patches on psi subsystem. A few
> weeks passed since the last review, so I put them together and resend for
> more convenient review and merge.
> 
> Patch 1 add PSI_CPU_FULL state means all non-idle tasks in a cgroup are delayed
> on the CPU resource which used by others outside of the cgroup or throttled
> by the cgroup cpu.max configuration.
> 
> Patch 2 use ONCPU state and the current in_memstall flag to detect reclaim,
> remove the hook in timer tick to make code more concise and maintainable.
> And patch 3 adds unlikely() annotations to move the pressure state branches
> out of line to eliminate undesirable jumps during wakeup and sleeps.
> 
> Patch 4 optimize the voluntary sleep switch by remove one call of
> psi_group_change() for every common cgroup ancestor of the two tasks.
> 
> Chengming Zhou (3):
>   psi: Add PSI_CPU_FULL state
>   psi: Use ONCPU state tracking machinery to detect reclaim
>   psi: Optimize task switch inside shared cgroups
> 
> Johannes Weiner (1):
>   psi: pressure states are unlikely

Peter, would you mind routing these through the sched tree for 5.13?

  parent reply	other threads:[~2021-03-03 18:42 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-03  3:46 [PATCH v2 0/4] psi: Add PSI_CPU_FULL state and some code optimization Chengming Zhou
2021-03-03  3:46 ` [PATCH v2 1/4] psi: Add PSI_CPU_FULL state Chengming Zhou
2021-03-04  9:09   ` [tip: sched/core] " tip-bot2 for Chengming Zhou
2021-03-06 11:42   ` tip-bot2 for Chengming Zhou
2021-03-03  3:46 ` [PATCH v2 2/4] psi: Use ONCPU state tracking machinery to detect reclaim Chengming Zhou
2021-03-03 14:56   ` Johannes Weiner
2021-03-03 15:52   ` Peter Zijlstra
2021-03-04  9:09   ` [tip: sched/core] " tip-bot2 for Chengming Zhou
2021-03-06 11:42   ` tip-bot2 for Chengming Zhou
2021-03-03  3:46 ` [PATCH v2 3/4] psi: pressure states are unlikely Chengming Zhou
2021-03-04  9:09   ` [tip: sched/core] psi: Pressure " tip-bot2 for Johannes Weiner
2021-03-06 11:42   ` tip-bot2 for Johannes Weiner
2021-03-03  3:46 ` [PATCH v2 4/4] psi: Optimize task switch inside shared cgroups Chengming Zhou
2021-03-03 14:57   ` Johannes Weiner
2021-03-03 15:53   ` Peter Zijlstra
2021-03-03 16:01     ` [External] " Muchun Song
2021-03-04  9:09   ` [tip: sched/core] " tip-bot2 for Chengming Zhou
2021-03-06 11:42   ` tip-bot2 for Chengming Zhou
2021-03-03 14:59 ` Johannes Weiner [this message]
2021-03-03 15:32   ` [PATCH v2 0/4] psi: Add PSI_CPU_FULL state and some code optimization Peter Zijlstra
2021-03-03 16:05     ` Peter Zijlstra
2021-03-03 19:38       ` Johannes Weiner
2021-03-04  0:14       ` [External] " Chengming Zhou

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