linux-kernel - Re: x86_64 Question: Are concurrent IPI requests safe?

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Message-Id: <201605120656.BHB73494.tOFMOFOLFQHVJS@I-love.SAKURA.ne.jp>
Date:	Thu, 12 May 2016 06:56:25 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	peterz@...radead.org
Cc:	tglx@...utronix.de, mingo@...nel.org, akpm@...ux-foundation.org,
	mgorman@...hsingularity.net, mhocko@...nel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: x86_64 Question: Are concurrent IPI requests safe?

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@...ns.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.