Andi Kleen wrote:
I always wondered why the xchg is necessary here at all. If the process of
tearing down a page table entry has started, other users of the mapped
linear address are broken anyway - why is it necessary to still monitor the
effect they may have on the A/D bits, unless this is a tr
> I always wondered why the xchg is necessary here at all. If the process of
> tearing down a page table entry has started, other users of the mapped
> linear address are broken anyway - why is it necessary to still monitor the
> effect they may have on the A/D bits, unless this is a transient tea
>>> Andi Kleen <[EMAIL PROTECTED]> 30.04.07 17:50 >>>
>
>From: Zachary Amsden <[EMAIL PROTECTED]>
>
>In situations where page table updates need only be made locally, and there is
>no cross-processor A/D bit races involved, we need not use the heavyweight
>xchg instruction to atomically fetch and c
3 matches
Mail list logo
