linux-kernel - Re: [PATCH 2/2 v2] sched/wait: Introduce lock breaker in wake_up_page

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Message-ID: <CA+55aFzS66XTJ_JdUyunkAxB042dsj-=r7JdM1bbX7JiVBBrYQ@mail.gmail.com>
Date:   Thu, 14 Sep 2017 10:00:56 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Tim Chen <tim.c.chen@...ux.intel.com>
Cc:     "Liang, Kan" <kan.liang@...el.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...e.hu>, Andi Kleen <ak@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Johannes Weiner <hannes@...xchg.org>, Jan Kara <jack@...e.cz>,
        Christopher Lameter <cl@...ux.com>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        linux-mm <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2 v2] sched/wait: Introduce lock breaker in wake_up_page_bit

On Thu, Sep 14, 2017 at 9:50 AM, Tim Chen <tim.c.chen@...ux.intel.com> wrote:
>
> Kan tested this before so it should be still good.
> I checked that it applied cleanly on latest master.

Thanks, applied.

I really hope we end up fixing the migration thing too, but at least
4.14 will have the mitigation for the long wait queues.

               Linus