Re: [GIT PULL] Re: REGRESSION: Performance regressions fromswitching anon_vma->lock to mutex

[Andi Kleen]

> So user-return notifiers ought to be the ideal platform for that, 
> right? We don't even have to touch the scheduler: anything that 
> schedules will eventually return to user-space, at which point the 
> RCU GC magic can run.

That's not necessarily true. Consider a router which only routes and never runs
user space. You would starve it. Given it's somewhat obscure, but it's possible.

-Andi
-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
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