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Re: x86_64 Question: Are concurrent IPI requests safe?

From Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Newsgroups linux.kernel
Subject Re: x86_64 Question: Are concurrent IPI requests safe?
Date 2016-05-12 00:00 +0200
Message-ID <rxKkF-72-7@gated-at.bofh.it> (permalink)
References <rxCwP-Kt-25@gated-at.bofh.it> <rxCZR-1jh-33@gated-at.bofh.it> <rxDsS-1yk-13@gated-at.bofh.it> <rxE5B-2n7-35@gated-at.bofh.it> <rxGqK-4tl-15@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Peter Zijlstra wrote:
> On Thu, May 12, 2016 at 12:19:07AM +0900, Tetsuo Handa wrote:
> > Well, I came to feel that this is caused by down_write_killable() bug.
> > I guess we should fix down_write_killable() bug first.
> 
> There's a patch you can try in that thread...
> 
>   lkml.kernel.org/r/20160511094128.GB3190@twins.programming.kicks-ass.net
> 

OK. Applying that patch on next-20160511 seems to fix this problem.
Please send it to linux-next tree. Thank you.

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Thread

[next-20160506 mm,smp] hang up at csd_lock_wait() from drain_all_pages() Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-05-06 13:00 +0200
  x86_64 Question: Are concurrent IPI requests safe? Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-05-09 17:00 +0200
    Re: x86_64 Question: Are concurrent IPI requests safe? Thomas Gleixner <tglx@linutronix.de> - 2016-05-09 19:00 +0200
      Re: x86_64 Question: Are concurrent IPI requests safe? Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-05-11 15:30 +0200
        Re: x86_64 Question: Are concurrent IPI requests safe? Peter Zijlstra <peterz@infradead.org> - 2016-05-11 15:40 +0200
          Re: x86_64 Question: Are concurrent IPI requests safe? Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-05-11 16:10 +0200
            Re: x86_64 Question: Are concurrent IPI requests safe? Thomas Gleixner <tglx@linutronix.de> - 2016-05-11 16:40 +0200
              Re: x86_64 Question: Are concurrent IPI requests safe? Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-05-11 17:20 +0200
                Re: x86_64 Question: Are concurrent IPI requests safe? Peter Zijlstra <peterz@infradead.org> - 2016-05-11 19:50 +0200
                Re: x86_64 Question: Are concurrent IPI requests safe? Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> - 2016-05-12 00:00 +0200
        Re: x86_64 Question: Are concurrent IPI requests safe? Thomas Gleixner <tglx@linutronix.de> - 2016-05-11 16:20 +0200

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