Messages in this thread |  | | Date | Wed, 15 Jun 2011 14:15:17 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [GIT PULL] Re: REGRESSION: Performance regressions from switching anon_vma->lock to mutex |
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On Wed, Jun 15, 2011 at 02:05:46PM -0700, Linus Torvalds wrote: > > > Ingo Molnar <mingo@elte.hu> wrote: > > > >I have this fix queued up currently: > > > > 09223371deac: rcu: Use softirq to address performance regression > > I really don't think that is even close to enough. > > It still does all the callbacks in the threads, and according to Peter, about half the rcu time in the threads remained..
I am putting together a patch that gets rid of the kthreads in the !RCU_BOOST case. The time will still be consumed, but in softirq context, though of course with many fewer context switches.
Thanx, Paul
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