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From:   Linus Torvalds <torvalds@linuxfoundation.org>
Date:   Wed, 11 May 2022 10:42:21 -0700
Message-ID: <CAHk-=whUy_cuJsVeob4zDnK5sWpE3U2EjVbnR2xobqgx7DOp4g@mail.gmail.com>
Subject: Re: [PATCH 8/7] sched: Update task_tick_numa to ignore tasks without
 an mm
To:     "Eric W. Biederman" <ebiederm@xmission.com>
Cc:     linux-arch <linux-arch@vger.kernel.org>, Tejun Heo <tj@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Jens Axboe <axboe@kernel.dk>,
        Thomas Gleixner <tglx@linutronix.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Wed, May 11, 2022 at 10:37 AM Eric W. Biederman
<ebiederm@xmission.com> wrote:
>
> With the change to init and the user mode helper processes to not have
> PF_KTHREAD set before they call kernel_execve the PF_KTHREAD test in
> task_tick_numa became insufficient to detect all tasks that have
> "->mm == NULL".  Correct that by testing for "->mm == NULL" directly.

If you end up rebasing at any time for other reasons (I didn't even
check if you keep this series in a public git branch), please just
fold this fix into the original commit, so that we don't have
unnecessary bisection issues.

               Linus