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SubjectRe: [PATCH v10 6/7] sched: Provide runnable_load_avg back to cfs_rq
On Mon, Jul 27, 2015 at 12:04:20PM +0800, Boqun Feng wrote:
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > > > 1) blocked load is more "difficult" to track, hint, migrate.
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> I may not get your point here? Are you saying my patch fails to handle
> the migration or are you just telling me that blocked load tracking need
> to take migration into consideration?

Both, is it so difficult to get?

> If it's the latter one, I want to say that, with blocked load or not, we
> have to handle load_avg in migrations, so *adding* some code to handle
> blocked load is not a big deal.
>
> Please consider this piece of code in update_cfs_rq_load_avg(), which
> decays and updates blocked_load_avg.

At this point of time, you tell me why exactly you want to track the blocked?


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