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SubjectRe: [git pull] scheduler updates

* Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Sat, 8 Nov 2008, Ingo Molnar wrote:
> >
> > So that's why my change moves it from the __native_read_tsc() over
> > to _only_ the vget_cycles().
>
> Ahh. I was looking at native_read_tscp(). Which has no barriers. But
> then we don't actually save the actual TSC, we only end up using the
> "p" part, so we don't care..

sidenote #3: RDTSCP is a relatively new instruction, and has implicit
barrier properties: it is a serializing instruction.

Ingo


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