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SubjectRe: [PATCH 14/38] Remove struct mm_struct::exe_file et al


On Sun, 31 May 2009, Andrew Morton wrote:
>
> What I always find a bit weird is that an MM container is used as the
> central point for a number of sched obects. But it's logical, given
> that the never-before-stated definition of a heavyweight process is
> "thing which share a VM".

It has nothing to do with "heavy-weight process" or anything else.

The thing is, from a scheduling standpoint, one of the primary performance
concerns in the TLB switch.

And there's a 1:1 relationship between TLB switch and MM container, modulo
the issue of kernel tasks (and those obviously "borrow" approproate MM
structs to avoid the switch).

So it's not weird at all. It's very direct, and a very straightforward and
obvious relationship.

Linus


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