Re: [PATCH] sched: fix conflict of schedule domain balance in RTscheduling

From: Peter Zijlstra
Date: Thu Jun 02 2011 - 07:53:02 EST

On Wed, 2011-06-01 at 21:58 +0800, Hillf Danton wrote:
> SD_BALANCE_WAKE and SD_WAKE_AFFINE are defined to be mutually
> exclusive

Uhm, no they're not.. both affect placement of a woken task but they're
complementary. WAKE_AFFINE is a check to see if it makes sense to run
the woken task on the same cpu as the wakee, BALANCE_WAKE does a full
load-balance pass, in case its combined with WAKE_AFFINE it does so in
case that test is negative.

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