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From: Greg KH <gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
To: Qais Yousef <qyousef-wp2msK0BRk8tq7phqP6ubQ@public.gmane.org>
Cc: stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Juri Lelli <juri.lelli-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Waiman Long <longman-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Dietmar Eggemann <dietmar.eggemann-5wv7dgnIgG8@public.gmane.org>,
	Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
	Vincent Guittot
	<vincent.guittot-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Hao Luo <haoluo-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	John Stultz <jstultz-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 0/6] Backport rework of deadline bandwidth restoration for 6.1.y
Date: Mon, 21 Aug 2023 15:26:03 +0200	[thread overview]
Message-ID: <2023082140-dreaded-hemstitch-84b9@gregkh> (raw)
In-Reply-To: <20230820152417.518806-1-qyousef-wp2msK0BRk8tq7phqP6ubQ@public.gmane.org>

On Sun, Aug 20, 2023 at 04:24:11PM +0100, Qais Yousef wrote:
> This is a backport of the series that fixes the way deadline bandwidth
> restoration is done which is causing noticeable delay on resume path. It also
> converts the cpuset lock back into a mutex which some users on Android too.
> I lack the details but AFAIU the read/write semaphore was slower on high
> contention.
> 
> Compile tested against some randconfig for different archs and tested against
> android14-6.1 GKI kernel.
> 
> My testing is limited to resume path only; and general phone usage to make sure
> nothing falls apart. Would be good to have some deadline specific testing done
> too.
> 
> Based on v6.1.46

I can't take these for only some branches, as you know.  Any reason why
you didn't also do 6.4.y?

thanks,

greg k-h

  parent reply	other threads:[~2023-08-21 13:26 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-20 15:24 [PATCH 0/6] Backport rework of deadline bandwidth restoration for 6.1.y Qais Yousef
2023-08-20 15:24 ` [PATCH 1/6] cgroup/cpuset: Rename functions dealing with DEADLINE accounting Qais Yousef
2023-08-20 15:24 ` [PATCH 2/6] sched/cpuset: Bring back cpuset_mutex Qais Yousef
2023-08-20 15:24 ` [PATCH 3/6] sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets Qais Yousef
2023-08-20 15:24 ` [PATCH 4/6] cgroup/cpuset: Iterate only if DEADLINE tasks are present Qais Yousef
2023-08-20 15:24 ` [PATCH 5/6] sched/deadline: Create DL BW alloc, free & check overflow interface Qais Yousef
     [not found] ` <20230820152417.518806-1-qyousef-wp2msK0BRk8tq7phqP6ubQ@public.gmane.org>
2023-08-20 15:24   ` [PATCH 6/6] cgroup/cpuset: Free DL BW in case can_attach() fails Qais Yousef
2023-08-21 13:26   ` Greg KH [this message]
2023-08-21 21:58     ` [PATCH 0/6] Backport rework of deadline bandwidth restoration for 6.1.y Qais Yousef

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