linux-kernel - Re: [PATCH v2 1/2] sched/isolation: use raw_smp_processor_id() in housekeeping_any

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Message-ID: <60c62d7a-940a-e424-15e0-af47cd36eacf@redhat.com>
Date:   Tue, 1 Mar 2022 19:57:52 +0100
From:   Daniel Bristot de Oliveira <bristot@...hat.com>
To:     Nicolas Saenz Julienne <nsaenzju@...hat.com>, mingo@...hat.com,
        peterz@...radead.org, frederic@...nel.org, rostedt@...dmis.org
Cc:     tglx@...utronix.de, mtosatti@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] sched/isolation: use raw_smp_processor_id() in
 housekeeping_any_cpu()

On 3/1/22 12:30, Nicolas Saenz Julienne wrote:
> housekeeping_any_cpu() will return a housekeeping CPU. That's it. It'll
> try to optimize for NUMA locality and to use the local CPU, but it's not
> a requisite.
> 
> So let's use raw_smp_processor_id() instead of its vanilla counterpart
> in order to allow users to query for housekeeping CPUs without having to
> disable preemption.
> 
> Signed-off-by: Nicolas Saenz Julienne <nsaenzju@...hat.com>

Reviewed-by: Daniel Bristot de Oliveira <bristot@...nel.org>

-- Daniel