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

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Message-Id: <201605112309.AGJ18252.tOFMFQOJFLSOVH@I-love.SAKURA.ne.jp>
Date:	Wed, 11 May 2016 23:09:21 +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 Wed, May 11, 2016 at 10:19:16PM +0900, Tetsuo Handa wrote:
> > [  180.434659] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/31/2013
> 
> can you reproduce on real hardware?
> 
Unfortunately, I don't have a real hardware to run development kernels.

My Linux environment is limited to 4 CPUs / 1024MB or 2048MB RAM running
as a VMware guest on Windows. Can somebody try KVM environment with
4 CPUs / 1024MB or 2048MB RAM whith partition only plain /dev/sda1
formatted as XFS?