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SubjectRe: [RFC 00/15] x86_64: Optimize percpu accesses
H. Peter Anvin wrote:
> Mike Travis wrote:
>> H. Peter Anvin wrote:
>>> Hi Mike,
>>>
>>> Did the suspected linker bug issue ever get resolved?
>>>
>>> -hpa
>>
>> Hi Peter,
>>
>> I was not able to figure out how the two versions of the same
>> kernel compiled by gcc-4.2.0 and gcc-4.2.4 differed. Currently,
>> I'm sticking with gcc-4.2.4 as it boots much farther.
>>
>> There still is a problem where if I bump THREAD_ORDER, the
>> problem goes away and everything so far that I've tested boots
>> up fine.
>>
>> We tried to install a later gcc (4.3.1) that might have the
>> "GCC_HAS_SP" flag but our sys admin reported:
>>
>> The 4.3.1 version gives me errors on the make. I had to
>> pre-install gmp and mpfr, but, I still get errors on the make.
>>
>> I think that was the latest he found on the GNU/GCC site.
>>
>
> We have seen miscompilations with gcc 4.3.0 at least; not sure about 4.3.1.
>
> -hpa

Hmm, I wonder how the CONFIG_CC_STACKPROTECTOR was tested? Could it
be a config option for building GCC itself?

Thanks,
Mike


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