linux-kernel - Re: [Help Test] kdump, x86, acpi: Reproduce CPU0 SMI corruption issue after unsetting BSP flag

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Message-ID: <5211E1C3.7090009@jp.fujitsu.com>
Date:	Mon, 19 Aug 2013 18:13:39 +0900
From:	HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Jingbai Ma <jingbai.ma@...com>, Fenghua Yu <fenghua.yu@...el.com>,
	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Mitchell, Lisa (MCLinux in Fort Collins)" <lisa.mitchell@...com>,
	"H. Peter Anvin" <hpa@...or.com>, bhelgaas@...gle.com,
	Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [Help Test] kdump, x86, acpi: Reproduce CPU0 SMI corruption issue
 after unsetting BSP flag

(2013/08/19 11:59), Eric W. Biederman wrote:
>
>
>
>>
>> Sorry Eric, I'm not clear to what you mean by ``short one core''...
>> Which are you suggesting? Disabling BSP if crash happens on AP is
>> reasonable?
>> Or restricting cpus to a single one only just as the current kdump
>> configuration is reasonable?
>
> I am suggesting we start every cpu except the BSP from the AP we started on.
>
> N-1 cpus seems like a good tradeoff between performance and reliability for those who need it.
>
> Eric
>

Thanks. I'm now clear.

Well, I'll post a version 2 patch after upgrading it for current upstream kernel.
But it would be next week or later.

-- 
Thanks.
HATAYAMA, Daisuke

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