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

[Larry Finger]

On 11/30/2011 01:09 AM, Larry Finger wrote:
> On 11/29/2011 11:59 PM, Srivatsa S. Bhat wrote:
> > 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
>
> Srivatsa,
>
> Thanks for the reference. That patch does fix my problem. Too bad that the bad
> commit was not in the subject of that other thread so that I could have found it
> with Google.

Borislav,

I just updated mainline to 3.2-rc4, and that patch is not included. Please check 
with Ingo to see why it was not available. It is a real show stopper for old AMD 
CPUs.

Thanks,

Larry

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/