linux-kernel - Re: 2.6.26, PAT and AMD family 6

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Message-ID: <86802c440805061939q39ff5500h3c9e229ecbc6b2e6@mail.gmail.com>
Date:	Tue, 6 May 2008 19:39:44 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Rene Herman" <rene.herman@...access.nl>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Linux Kernel" <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.26, PAT and AMD family 6

On Tue, May 6, 2008 at 6:48 PM, Rene Herman <rene.herman@...access.nl> wrote:
> Good day.
>
>  On 2.6.25 and below, my /proc/cpuinfo looks like:
>
>  processor       : 0
>  vendor_id       : AuthenticAMD
>  cpu family      : 6
>  model           : 7
>  model name      : AMD Duron(tm) Processor
>  stepping        : 1
>  cpu MHz         : 1312.969
>  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 pae mce cx8 sep mtrr pge mca cmov
> pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow ts
>  bogomips        : 2628.68
>  clflush size    : 32
>
>  while on current mainline PAT and TS (Temperature Sensor) drop from the
> feature flags:
>
>  flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov
> pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
>
>  With respect to PAT, I guess it's 9307cacad0dfe3749f00303125c6f7f0523e5616,
> "x86: pat cpu feature bit setting for known cpus" but what's this about?
>
>  Did my cpuinfo lie upto this point or shouldn't the flag be cleared? The
> commit message for that change is completely and totally unhelpful.

others like to to whitebox methods, ..., please try attach patch to
see if duron support PAT.

YH

View attachment "duron_pat.patch" of type "text/x-patch" (526 bytes)