linux-kernel - Re: 3.2-rc2 freezes on boot for AMD K6 - bisected to commit bcb80e53877c2045d9e52f4a71372c3fe6501f6f

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Message-ID: <4ED5C640.8030102@linux.vnet.ibm.com>
Date:	Wed, 30 Nov 2011 11:29:28 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	Larry Finger <Larry.Finger@...inger.net>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <borislav.petkov@....com>
Subject: Re: 3.2-rc2 freezes on boot for AMD K6 - bisected to commit bcb80e53877c2045d9e52f4a71372c3fe6501f6f

On 11/30/2011 10:24 AM, Larry Finger wrote:

> I have an ancient laptop with an AMD-K6 CPU that freezes on boot with
> 3.2-rc2. The problem was bisected to commit bcb80e53877c2.
> 
> The cpuinfo for this box is:
> 
>>> cpu.1: cpuinfo
> ----- /proc/cpuinfo -----
>   processor     : 0
>   vendor_id     : AuthenticAMD
>   cpu family    : 5
>   model         : 8
>   model name    : AMD-K6(tm) 3D processor
>   stepping      : 12
>   cpu MHz               : 428.804
>   cache size    : 64 KB
>   fdiv_bug      : no
>   hlt_bug               : no
>   f00f_bug      : no
>   coma_bug      : no
>   fpu           : yes
>   fpu_exception : yes
>   cpuid level   : 1
>   wp            : yes
>   flags         : fpu vme de pse tsc msr cx8 pge mmx syscall 3dnow
> k6_mtrr up
>   bogomips      : 857.60
>   clflush size  : 32
>   cache_alignment       : 32
>   address sizes : 32 bits physical, 32 bits virtual
>   power management:
> 
> ----- /proc/cpuinfo end -----
> 
> This patch is quite simple, thus it appears that rdmsr() is OK, but that
> rdmsr_safe() is not.
> 
> I am happy to provide any other info regarding this box.
> 
 

Hi Larry,

Can you please try out the patch posted in
https://lkml.org/lkml/2011/11/28/178 ?

This patch will be available in mainline kernel from -rc4.
https://lkml.org/lkml/2011/11/28/457

-- 
Regards,
Srivatsa S. Bhat
IBM Linux Technology Center

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