linux-kernel - Re: Bug on 2.6.26 - x86 VIA Nehemiah CentaurHauls processor cannot boot

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Message-ID: <48862526.7060704@zytor.com>
Date:	Tue, 22 Jul 2008 14:21:26 -0400
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jeff Garzik <jeff@...zik.org>
CC:	"Luis R. Rodriguez" <mcgrof@...il.com>,
	linux kernel <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...nel.org>,
	Ivan Seskar <Seskar@...lab.rutgers.edu>,
	jfm3 <jfm3@...lab.rutgers.edu>, Sujith <m.sujith@...il.com>
Subject: Re: Bug on 2.6.26 - x86 VIA Nehemiah CentaurHauls processor cannot
 boot

Jeff Garzik wrote:
>>
>> Thanks for taking a  look at this. So well, it would be a
>> misconfiguration bug by the distribution then to try to support a
>> generic 686 kernel wihtout GENERIC then.
> 
> Well, it may be intentional -- some distros simply exclude support for 
> the lower-volume VIA processors, since that might imply building their 
> "generic 686 kernel" sans CMOV and some other instructions, and changing 
> the compiler's instruction scheduling to something less optimal for the 
> majority.  :/
> 

X86_GENERIC shouldn't disable CMOV?

We're only referring specifically to the family == 6 VIA processors here.

	-hpa

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