linux-kernel - Re: tip/master broken with x2apic and kexec

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Date:	Tue, 13 Jul 2010 15:00:48 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: tip/master broken with x2apic and kexec

On 07/12/2010 07:59 PM, Yinghai Lu wrote:
> tip/master: 
> system1: BIOS enabled x2apic, first kernel boot well, and when kexec second kernel will cause system instant reboot.
> 
> system2: BIOS not enable x2apic, first kernel boot well and enable x2apic, and kexec second kernel well. but when kexec third kernel will case system instant reboot.
> 
> linus' tree is ok.
> 
> but for system2 if boot with nox2apic ,intr-remaping off, iommu off, the kexec loop test will pass.
> 
> the problem looks start in recent two or three weeks.
> 
> Any idea?
> 
> bisecting will take a while, because the system post take a while everytime.
> 
> Thanks
> 
> Yinghai Lu

OK, I found the bug... if you could test out the patch which will be
sent out shortly I would very much appreciate it.

	-hpa
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