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From:   "Huang, Ying" <ying.huang@intel.com>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Qian Cai <quic_qiancai@quicinc.com>,
        Ingo Molnar <mingo@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Juri Lelli <juri.lelli@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
        Daniel Bristot de Oliveira <bristot@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Borislav Petkov <bp@alien8.de>,
        Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [GIT PULL] scheduler updates for v5.18
References: <YjhZUezhnamHAl0H@gmail.com> <Yjh58h8cpcPERVZA@qian>
        <CAHk-=whrqeX-8yHEdSCGFUyyC2sj=OLyeFR9civUiswR=A+PwA@mail.gmail.com>
Date:   Tue, 22 Mar 2022 08:54:45 +0800
In-Reply-To: <CAHk-=whrqeX-8yHEdSCGFUyyC2sj=OLyeFR9civUiswR=A+PwA@mail.gmail.com>
        (Linus Torvalds's message of "Mon, 21 Mar 2022 17:18:33 -0700")
Message-ID: <875yo6ajsa.fsf@yhuang6-desk2.ccr.corp.intel.com>
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Hi, Linus,

Linus Torvalds <torvalds@linux-foundation.org> writes:

> On Mon, Mar 21, 2022 at 6:13 AM Qian Cai <quic_qiancai@quicinc.com> wrote:
>>
>> On Mon, Mar 21, 2022 at 11:54:09AM +0100, Ingo Molnar wrote:
>> > Huang Ying (3):
>> >       sched/numa-balancing: Move some document to make it consistent with the code
>> >       sched/numa: Fix NUMA topology for systems with CPU-less nodes
>> >       sched/numa: Avoid migrating task to CPU-less node
>>
>> Linus, I don't think you want to merge this as-is. This will introduce a
>> kernel crash on arm64 NUMA as mentioned in this thread,
>
> Ok, dropped from my queue. Thanks,

Can you just drop the last one, that is,

  sched/numa: Avoid migrating task to CPU-less node

That is the patch that has the bug reported by Qian.  The other 2 are
good.

I will work with Peter and Ingo to update the buggy patch.

Best Regards,
Huang, Ying