Re: [RFC 00/15] x86_64: Optimize percpu accesses

[Mike Travis]

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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