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SubjectRe: [RFC 00/15] x86_64: Optimize percpu accesses
Jeremy Fitzhardinge wrote:
> Mike Travis wrote:
>> FYI, I think it was a combination of errors that was causing my problems.
>> In any case, I've successfully compiled and booted Ingo's pesky config
>> config-Tue_Jul__1_16_48_45_CEST_2008.bad with gcc's 4.2.0, 4.2.3 and
>> 4.2.4
>> on both Intel and AMD boxes. (As well as a variety of other configs.)
>>
>
> Good. What compilers have you tested? Will it work over the complete
> supported range?

The oldest gcc I have available is 3.4.3 (and I just tried that one and
it worked.) So that one and the ones listed above I've verified using
Ingo's test config. (All other testing I'm using 4.2.3.)

>
>> I think Hugh's change adding "text" to the BUILD_IRQ macro might also
>> have
>> helped, since interrupts seemed to have always been involved in the
>> panics.
>> That might explain the variable-ness of the gcc version's.
>
> Yes, indeed. That was a nasty one, and will be very sensitive to the
> exact order gcc decided to emit things.
>
> J



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