Re: [PATCH for mm] Remove iBCS support

David Newall
2008-01-25T02:16:41Z

Andi Kleen wrote:
>> The performance benefit is trivial,
>>
>
> That's actually not true when you're talking about potential cache misses.
> Cache misses are very expensive.
>

They are when in a tight loop, but are trivial in this case. I'll go
further and say that unless the system is constantly execing, there will
always be a cache miss, and that removing this code will not improve
that at all.