From mboxrd@z Thu Jan 1 00:00:00 1970 From: dietmar.eggemann@arm.com (Dietmar Eggemann) Date: Thu, 25 Sep 2014 20:19:42 +0100 Subject: [PATCH v6 5/6] sched: replace capacity_factor by usage In-Reply-To: References: <1411488485-10025-1-git-send-email-vincent.guittot@linaro.org> <1411488485-10025-6-git-send-email-vincent.guittot@linaro.org> <542303DF.8010606@arm.com> Message-ID: <54246ACE.1080502@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 25/09/14 09:35, Vincent Guittot wrote: > On 24 September 2014 19:48, Dietmar Eggemann wrote: >> On 23/09/14 17:08, Vincent Guittot wrote: >> > > [snip] > >> >> This review (by PeterZ) during v5 of your patch-set recommended some >> renaming (e.g. s/group_has_free_capacity/group_has_capacity and >> s/group_out_of_capacity/group_no_capacity as well as reordering of the >> parameters which I agree with: >> >> https://lkml.org/lkml/2014/9/11/706 > > Ah... you're right, these changes have passed through my seance of renaming What about the ordering of the function parameters in group_has_capacity, group_is_overloaded and group_type group_classify? All the existing *load balance* related functions in fair.c seem to follow this (struct lb_env *env, struct sd_lb_stats *sds, struct sched_group *group, struct sg_lb_stats *sgs) order. > >> >>> >>> -/* > > [snip] > >>> - if (sgs->group_capacity_factor > sgs->sum_nr_running) >>> - sgs->group_has_free_capacity = 1; >>> + sgs->group_type = group_classify(group, sgs, env); >>> + >>> + sgs->group_out_of_capacity = group_is_overloaded(sgs, env); >> >> In case sgs->group_type is group_overloaded you could set >> sgs->group_out_of_capacity to 1 without calling group_is_overloaded again. > > I prefer to keep sgs->group_out_of_capacity = group_is_overloaded(sgs, > env) and use it in group_classify in case of future changes in the > classification order Ok, but than group_is_overloaded is called twice at the end of update_sg_lb_stats with exactly the same result. Looks weird in my traces. > [...]