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    SubjectRe: [PATCH]sched_rt.c: Avoid unnecessary dequeue and enqueue of pushable tasks in set_cpus_allowed_rt()
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    On Sat, 2012-03-17 at 03:58 +0400, Kirill Tkhai wrote:
    > Steven, what is about the patch from my previous message? Is everything ok?

    You're timing is impeccable. I was in Chemnitz, Germany when you sent
    this, and it too was lost in the noise ;-)

    I'll take a look at it today.

    Thanks!

    -- Steve


    >
    > Regards,
    > Kirill
    >
    > 19.02.2012, 18:17, "Kirill Tkhai" <tkhai@yandex.ru>:
    > > 13.02.2012, 21:23, "Steven Rostedt" <rostedt@goodmis.org>:
    > >
    > >> I wasn't on the Cc of the original message, but it was bounced to me
    > >> awhile ago. I'm cleaning out my email and came across it.
    > >>
    > >> Can you send me the latest version of this patch, either against latest
    > >> Linus, or against tip/master.
    > >>
    > >> Thanks,
    > >>
    > >> -- Steve
    > >>
    > >> P.S. I'll be at ELC this week so it may not get processed right away.
    > >
    > > Migration status depends on a difference of weight from 0 and 1.
    > > If weight > 1 (<= 1) and old weight <= 1 (> 1) then task becomes
    > > pushable (or not pushable). We are not insterested in its exact
    > > values, is it 3 or 4, for example.
    > >
    > > Now if we are changing affinity from a set of 3 cpus to a set of 4, the-
    > > task will be dequeued and enqueued sequentially without important
    > > difference in comparison with initial state. The only difference is in
    > > internal representation of plist queue of pushable tasks and the fact
    > > that the task may won't be the first in a sequence of the same priority
    > > tasks. But it seems to me it gives nothing.
    > >
    > > Signed-off-by: Tkhai Kirill <tkhai@yandex.ru>




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