linux-kernel - Re: [PATCH 1/2] x86: mce: kdump: use under_crashdumping to turn off MCE in all CPUs together

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Date:	Tue, 24 Feb 2015 22:19:37 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Naoya Horiguchi <nao.horiguchi@...il.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Junichi Nomura <j-nomura@...jp.nec.com>,
	Kiyoshi Ueda <k-ueda@...jp.nec.com>
Subject: Re: [PATCH 1/2] x86: mce: kdump: use under_crashdumping to turn off
 MCE in all CPUs together

On Tue, Feb 24, 2015 at 06:47:23PM +0000, Luck, Tony wrote:
> since offline cpus will still show up to rendezvous ... perhaps
> "num_present_cpus()" is the right number??

Provided nmi_shootdown_cpus() code path clears offlined CPUs from
cpumasks so that num_present_cpus() or any other for that matter returns
the correct number, but I don't see it upon a quick grep...

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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