Re: [git pull] scheduler fixes

[Ingo Molnar]

* Matthew Wilcox <matthew@xxxxxx> wrote:

> > the gain is rather obvious: two parallel up()s (or just up()s which 
> > come close enough after each other) will wake up two tasks in 
> > parallel. With your patch, the first guy wakes up and then it wakes 
> > up the second guy. I.e. your patch serializes the wakeup chain, mine 
> > keeps it parallel.
> 
> Yup.  I explained why that's actually beneficial in an earlier email.

but the problem is that by serializing the wakeup chains naively you 
introduced a more than 50% AIM7 performance regression.

	Ingo
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