Messages in this thread | | | Date | Thu, 16 Jun 2011 14:02:16 -0700 | From | Andi Kleen <> | Subject | Re: [GIT PULL] Re: REGRESSION: Performance regressions from switching anon_vma->lock to mutex |
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> 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
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