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    SubjectRe: [GIT PULL] Re: REGRESSION: Performance regressions from switching anon_vma->lock to mutex
    On Wed, Jun 15, 2011 at 02:05:46PM -0700, Linus Torvalds wrote:
    > Ingo Molnar <> 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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