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Message-ID: <2023082140-dreaded-hemstitch-84b9@gregkh>
Date: Mon, 21 Aug 2023 15:26:03 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Qais Yousef <qyousef@...alina.io>
Cc: stable@...r.kernel.org, Juri Lelli <juri.lelli@...hat.com>,
Waiman Long <longman@...hat.com>, Tejun Heo <tj@...nel.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Peter Zijlstra <peterz@...radead.org>,
Vincent Guittot <vincent.guittot@...aro.org>,
Ingo Molnar <mingo@...nel.org>, Hao Luo <haoluo@...gle.com>,
John Stultz <jstultz@...gle.com>, cgroups@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] Backport rework of deadline bandwidth restoration
for 6.1.y
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
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