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SubjectRe: libata + siI3112 + 2.6.5-rc3 hang
Andrew Morton wrote:
> CaT <cat@zip.com.au> wrote:
>
>>Here's the patch that Joe sent me. It doesn't apply cleanly mainly due
>> to formatting errors in the patch but a bit of manual fixerupping made
>> it all apply.
>>
>> --- 8< ---
>> --- linux-2.6.4-orig/arch/i386/pci/fixup.c 2004-03-11
>> 03:55:36.000000000 +0100
>> +++ linux-2.6.4/arch/i386/pci/fixup.c 2004-03-16 13:12:25.706569480 +0100
>> @@ -187,6 +187,22 @@
>> dev->transparent = 1;
>> }
>>
>> +/*
>> + * Halt Disconnect and Stop Grant Disconnect (bit 4 at offset 0x6F)
>> + * must be disabled when APIC is used (or lockups will happen).
>> + */
>
>
> I had this in -mm for a while. Ended up dropping it because it made some
> people's CPUs run warmer and because it "wasn't the right fix".
>
> Does anyone know what the right fix is? If not, it seems that a warm CPU
> is better than a non-functional box. Maybe enable it via a boot option?

Ross' C1halt idle patch is the right thing to take. No fix, but stable
work-around.

Prakash
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