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Message-ID: <YRvYaGa4QnhV2q51@hirez.programming.kicks-ass.net>
Date: Tue, 17 Aug 2021 17:40:24 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Will Deacon <will@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-arch@...r.kernel.org,
linux-kernel@...r.kernel.org,
Catalin Marinas <catalin.marinas@....com>,
Marc Zyngier <maz@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Morten Rasmussen <morten.rasmussen@....com>,
Qais Yousef <qais.yousef@....com>,
Suren Baghdasaryan <surenb@...gle.com>,
Quentin Perret <qperret@...gle.com>, Tejun Heo <tj@...nel.org>,
Johannes Weiner <hannes@...xchg.org>,
Ingo Molnar <mingo@...hat.com>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Daniel Bristot de Oliveira <bristot@...hat.com>,
Valentin Schneider <valentin.schneider@....com>,
Mark Rutland <mark.rutland@....com>, kernel-team@...roid.com
Subject: Re: [PATCH v11 07/16] sched: Split the guts of sched_setaffinity()
into a helper function
On Fri, Jul 30, 2021 at 12:24:34PM +0100, Will Deacon wrote:
> In preparation for replaying user affinity requests using a saved mask,
> split sched_setaffinity() up so that the initial task lookup and
> security checks are only performed when the request is coming directly
> from userspace.
>
> Reviewed-by: Valentin Schneider <Valentin.Schneider@....com>
> Signed-off-by: Will Deacon <will@...nel.org>
Should not sched_setaffinity() update user_cpus_ptr when it isn't NULL,
such that the upcoming relax_compatible_cpus_allowed_ptr() preserve the
full user mask?
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