Re: [BUG] idle_balance() does not call load_balance_newidle()

From: Ingo Molnar
Date: Mon Dec 08 2008 - 10:50:02 EST



* Vaidyanathan Srinivasan <svaidy@xxxxxxxxxxxxxxxxxx> wrote:

> Hi,
>
> load_balance_newidle() does not get called if SD_BALANCE_NEWIDLE is
> set at higher level domain (3-CPU) and not in low level domain (2-MC).
>
> pulled_task is initialised to -1 and checked for non-zero which is
> always true if the lowest level sched_domain does not have
> SD_BALANCE_NEWIDLE flag set.
>
> Trivial fix to initialise pulled_task to zero.
> Patch against 2.6.28-rc7

applied to tip/sched/core, thanks! (Not for v2.6.28 because this could
affect performance.)

Ingo
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