Re: [git pull] x86 PAT changes

Gabriel C
2008-04-26T15:38:03Z

Ingo Molnar wrote:
> * Gabriel C <nix.or.die@googlemail.com> wrote:
>
>> Hi Ingo,
>>
>> When using an 64bit ( didn't got time to test 32bit now ) kernel[1]
>> with PAT enabled , kvm-intel does not work anymore.
>>
>> When modprobing kvm-intel , kvm is saying VT extension is disable by
>> BIOS which isn't true. When disabling PAT again ( no changes to BIOS )
>> kvm-intel works again here.
>>
>> Is that an known problem ?
>
> no, that side-effect was not known. Cc:-ed more folks.

It seems like the update triggers some compiler bug.

Setting CC_OPTIMIZE_FOR_SIZE=n fixed that btw.

I don't have the time right now but later on today I will compile
gcc43_svn_branch and test again with CC_OPTIMIZE_FOR_SIZE=y and see what I get.

Ingo sorry for the noise.

Gabriel