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Revert "ANDROID: sched/fair: Attempt to improve throughput for asym cap systems"

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This reverts commit 1a1d22a3d8.

We want to back-out the eas-dev merge that happened in the tree after
5.3-rc1 as those patches "should" all be in Linus's tree now.

This is done to handle the merge conflicts with 5.4-rc1.

Cc: Todd Kjos <tkjos@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I4f3a3b047d2c81f2f6de6da633964f009717a1cf
This commit is contained in:
Greg Kroah-Hartman
2019-09-19 20:48:36 +02:00
committed by Alistair Delva
parent 504e400e6c
commit 390260086c
1 changed files with 1 additions and 16 deletions
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17
kernel/sched/fair.c
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@@ -8461,22 +8461,7 @@ void fix_small_imbalance(struct lb_env *env, struct sd_lb_stats *sds)
capa_move /= SCHED_CAPACITY_SCALE;
/* Move if we gain throughput */
if (capa_move > capa_now) {
env->imbalance = busiest->load_per_task;
return;
}
/* We can't see throughput improvement with the load-based
* method, but it is possible depending upon group size and
* capacity range that there might still be an underutilized
* cpu available in an asymmetric capacity system. Do one last
* check just in case.
*/
if (env->sd->flags & SD_ASYM_CPUCAPACITY &&
busiest->group_type == group_overloaded &&
busiest->sum_nr_running > busiest->group_weight &&
local->sum_nr_running < local->group_weight &&
local->group_capacity < busiest->group_capacity)
if (capa_move > capa_now)
env->imbalance = busiest->load_per_task;
}