Messages in this thread | | | Date | Fri, 29 Apr 2011 20:34:41 +0200 | From | Jiri Slaby <> | Subject | Re: Linux 2.6.38.4 : regression due to x86 AMD ARAT feature |
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On 04/24/2011 09:44 PM, Ostrovsky, Boris wrote: > Borislav Petkov wrote, on 04/24/11 20:20: >> On Sun, Apr 24, 2011 at 10:06:36AM +0200, Jörg-Volker Peetz wrote: >>> With 2.6.38.4 the clock slows down and the affected laptop sometimes, e.g. for >>> the output of "ps axuw" to appear, needs an input from the keyboard or the >>> touchpad. Please find attached the kernel config file and the output of dmesg. >>> >>> Commenting out the the lines >>> >>> if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400)) >>> set_cpu_cap(c, X86_FEATURE_ARAT); >>> >>> in arch/x86/kernel/cpu/amd.c makes this laptop work as before with kernel >>> 2.6.38.3. I think these lines came with commit >>> d7b7f0c401303dd7eafcff11752fe74d3b75c766.
> It's an old family fh processor (CPUID 00020F42) that cpu_has_amd_erratum(amd_erratum_400) apparently hasn't picked up. Since all fh processors are affected by this erratum I'll replace "c->x86 >= 0xf" with "c->x86 > 0xf" (and probably fix erratum formula anyway).
Hi, what's the status of this please?
I don't see the fix neither in the -next tree.
thanks, -- js -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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