mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-27 20:07:09 +00:00
sched/fair: Make calculate_imbalance() independent
Rik noticed that calculate_imbalance() relies on update_sd_pick_busiest() to guarantee that busiest->sum_nr_running > busiest->group_capacity_factor. Break this implicit assumption (with the intent of not providing it anymore) by having calculat_imbalance() verify it and not rely on others. Reported-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Vincent Guittot <vincent.guittot@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/20140729152631.GW12054@laptop.lan Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
parent
98a96f2022
commit
743cb1ff19
@ -6248,7 +6248,7 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
|
||||
return fix_small_imbalance(env, sds);
|
||||
}
|
||||
|
||||
if (!busiest->group_imb) {
|
||||
if (busiest->sum_nr_running > busiest->group_capacity_factor) {
|
||||
/*
|
||||
* Don't want to pull so many tasks that a group would go idle.
|
||||
* Except of course for the group_imb case, since then we might
|
||||
|
Loading…
Reference in New Issue
Block a user