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

[Hillf Danton]

On Thu, Jun 2, 2011 at 7:56 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> 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,

Though I dont understand the following, my question is why WAKE_AFFINE is
eligible for pushing RT tasks off the RQ on which they are waiting.

thanks
           Hillf

>in case its combined with WAKE_AFFINE it does so in
> case that test is negative.
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/