Re: [PATCH] scheduler cleanup

Artur Skawina (skawina@geocities.com)
Thu, 14 Oct 1999 18:30:22 +0100

Borislav Deianov wrote:
>
> > > I think I see what Andrea means here. Scenario: CPU 0 runs process A,
> > > CPU 1 is idle, runqueue has only A. RT process B wakes up, previously
> > > run on CPU 0 and decides switching to CPU 1 is too expensive. Process
> > > A calls sched_yield(). You better reschedule.
> >
> > "decides switching to CPU 1 is too expensive" does not happen when CPU1
> > is idle. see wake_up_process()/reschedule_idle().
>
> Andrea is right here.

Andrea is as usual wrong. RTFS. I'm always thankful for any bugreports,
but i'm not going to fix imaginary bugs, obviously. [if anyone feels
like continuing arguing about this i can only suggest you first take a
close look at reschedule_idle(). [*]]

artur

[*] the behaviour, while it may not have been intentional, seems to be
mostly right. yes, this also means that the other "bug" mentioned
by Andrea in this thread does not exist either.

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