linux-kernel - Re: Fail to early boot with v2.6.27-rc2 to at least v2.6.29-rc2 due to dc1e35c

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Message-ID: <20090119201115.GD31356@linux-os.sc.intel.com>
Date:	Mon, 19 Jan 2009 12:11:16 -0800
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Avuton Olrich <avuton@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: Fail to early boot with v2.6.27-rc2 to at least v2.6.29-rc2 due to dc1e35c

On Mon, Jan 19, 2009 at 12:07:34PM -0800, H. Peter Anvin wrote:
> Avuton Olrich wrote:
> > 2009/1/19 H. Peter Anvin <hpa@...or.com>:
> >>> bisected to:
> >>> commit dc1e35c6e95e8923cf1d3510438b63c600fee1e2
> >>> Author: Suresh Siddha <suresh.b.siddha@...el.com>
> >>> Date:   Tue Jul 29 10:29:19 2008 -0700
> >>>
> >> Avuton, could you please compile the attached program and send us the
> >> output?
> > 
> > Sure whichever flavor you prefer:
> > http://avuton.googlepages.com/cpuid-out (3M)
> > http://avuton.googlepages.com/cpuid-out.bz2 (40K)
> 
> OK, that's an XSAVE-capable CPU, and yet the XSAVE code causes a crash. 
>   Not good...

Avuton, Does your bios has an option which says limit the cpuid
vector limit to '2' or something. Can you disable that option and
re-check? It will typically be located under cpu configuration settings.

My system which has same stepping etc works just fine. But my bios doesn't
have the cpuid limit option. I need to check if this issue is because
of the cpuid limit option that is enabled in the bios.

thanks,
suresh
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