linux-kernel - Re: [V4 PATCH 4/4] x86/apic: Introduce noextnmi boot option

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Message-ID: <20151001084335.GA3764@pd.tnic>
Date:	Thu, 1 Oct 2015 10:43:35 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	河合英宏 / KAWAI，HIDEHIRO 
	<hidehiro.kawai.ez@...achi.com>
Cc:	'Peter Zijlstra' <peterz@...radead.org>,
	Jonathan Corbet <corbet@....net>,
	Ingo Molnar <mingo@...nel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vivek Goyal <vgoyal@...hat.com>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Michal Hocko <mhocko@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	平松雅巳 / HIRAMATU，MASAMI 
	<masami.hiramatsu.pt@...achi.com>
Subject: Re: [V4 PATCH 4/4] x86/apic: Introduce noextnmi boot option

On Thu, Oct 01, 2015 at 07:01:50AM +0000, 河合英宏 / KAWAI，HIDEHIRO wrote:
> I suppose that a sever which uses this feature will equip a BMC
> and BMC mandatorily supports hard reset command for the server.
> If the HA clustering software detects no response from the server
> after relatively long timeout, it might want to insert hard reset
> to the server by IPMI over LAN.

So why doesn't the capture kernel *automatically* ignore external NMIs,
without a cmdline option?

Before it starts capturing, it says: "I'm starting capturing and am
ignoring external NMIs from now on."

-- 
Regards/Gruss,
    Boris.

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