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SubjectRe: preempt bug in set_pmd_pfn?
Andi Kleen wrote:
> On Wednesday 05 March 2008 01:07:11 Jeremy Fitzhardinge wrote:
>
>> Andi Kleen wrote:
>>
>>>> Won't this leave a stale tlb on the old processor?
>>>>
>>>>
>>> __set_fixmap should be only used in early boot, so it's always
>>> on CPU 0
>>>
>> vdso32-setup.c:map_compat_vdso() uses it to create the compat vdso
>> mapping, which typically happens on the first execve(),
>>
>
> First execve for 32bit binaries?
>

Yes, 32-bit kernel.

> Anyways __set_fixmap is __init and at the first execve (unless you have initramfs)
> init.text should be already freed.

No, its not __init. If it were I don't think there would have been much
booting going on for the last few months.

J


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