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Message-ID: <20090119215736.GE31356@linux-os.sc.intel.com> Date: Mon, 19 Jan 2009 13:57:36 -0800 From: Suresh Siddha <suresh.b.siddha@...el.com> To: Avuton Olrich <avuton@...il.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@...el.com>, "H. Peter Anvin" <hpa@...or.com>, LKML <linux-kernel@...r.kernel.org>, 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 01:46:37PM -0800, Avuton Olrich wrote: > On Mon, Jan 19, 2009 at 12:11 PM, Suresh Siddha > <suresh.b.siddha@...el.com> wrote: > > 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. > > You're the winner of the prize. The culprit in my bios was: > > Max CPUID Value Limit: Enabled Though the bios is the culprit and this option will severely limit the cpu capabilities that OS can take advantage of, OS should fallback to a safer mode. I will have a patch for it. Also, I wonder, if we should complain/scream during boot if we find only fewer cpuid levels on modern generation cpu's. thanks, suresh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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