Re: [git pull] scheduler updates

[Ingo Molnar]

* Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> 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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