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    SubjectRe: [PATCH] RCU for low latency (experimental)
    At Sun, 28 Mar 2004 22:50:36 +0530,
    Dipankar Sarma wrote:
    > On Sun, Mar 28, 2004 at 06:53:47PM +0200, Takashi Iwai wrote:
    > > it seems count is never incremented in your patch...
    > > or am i missing something?
    > I messed it up when I forward ported the throttle-rcu.patch
    > from 2.6.0+lots-of-instrumentation to 2.6.4-vanilla in order
    > to publish in lkml. The original patch did this -

    thans for the patch. i expected the similar fix :)

    > > anyway, i confirmed that with the original krcud patch the latency
    > > with dcache flood can be eliminated.
    > Does the throttle-rcu patch also help eliminate dcache flood ? You
    > can try by just changing count >= rcumaxbatch to ++count > rcumaxbatch.

    i'll try it later.

    > > for the non-preemptive case, rcu_bh_callback_limit() should return
    > > bhlimit always, though. otherwise cond_resched() isn't called in the
    > > callback loop properly.
    > Yes, I think we should consider using limiting even in the non-preemptive
    > case.

    you mean preemptive case?

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