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

Andi Kleen
2011-06-16T21:03:40Z

> 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@linux.intel.com -- Speaking for myself only