linux-kernel - Re: [PATCH] ARM: perf: ensure the cpu is available to scheduler when set irq affinity

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Message-ID: <CAJFZqHzRknnf9r3E1TCY_0NrKJ_3z8yTtqZ6+ur6u+-0h7vDyA@mail.gmail.com>
Date:	Wed, 28 Oct 2015 11:22:28 +0800
From:	Li RongQing <roy.qing.li@...il.com>
To:	Will Deacon <will.deacon@....com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: perf: ensure the cpu is available to scheduler when
 set irq affinity

On Wed, Oct 28, 2015 at 12:47 AM, Will Deacon <will.deacon@....com> wrote:
>> +                             continue;
>> +
>
> Isn't this all racy against concurrent hotplug events? We're probably
> better off requesting the IRQs at PMU probe time, since we no longer have
> to worry about sharing the IRQ lines with other subsystems such as oprofile,
> which is why it was designed this way originally.


Could you write a patch?
Thanks

-Roy
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