linux-kernel - Re: [PATCH stable 0/1] x86: aperfmperf: bug report

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Date:   Fri, 4 Nov 2022 10:26:01 +0800
From:   Yipeng Zou <zouyipeng@...wei.com>
To:     <tglx@...utronix.de>, <bp@...en8.de>, <mingo@...hat.com>,
        <x86@...nel.org>, <hpa@...or.com>, <rafael.j.wysocki@...el.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH stable 0/1] x86: aperfmperf: bug report

Ping~

在 2022/10/21 10:17, Yipeng Zou 写道:
> Recently i was doing some work about calculating CPU frequency on x86 on
> stable branch linux-5.10.y, and there is a problem which i descrip in
> the commit message.
>
> I've noticed that it has been abandoned on the mainline. On the mainline
> it becomes to update [a,m]cnt in timer code with HZ frequency, and it is
> actually calculated at the time of reading the cpu freqency. This solves
> the problem above.
>
> So, Are there other reasons why the stable branch doesn't have these
> changes?, this patch is just to ask how we plan to fix it.
>
> Yipeng Zou (1):
>    x86: aperfmperf: fix overflow problem in the concurrency scenario
>
>   arch/x86/kernel/cpu/aperfmperf.c | 4 ----
>   1 file changed, 4 deletions(-)
>
-- 
Regards,
Yipeng Zou