evie/android_kernel_oneplus_msm8998
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sched: EAS: update trg_cpu to backup_cpu if no energy saving for target_cpu

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If no energy saving for target_cpu in the calculation of energy_diff(),
backup_cpu will be set as the new dst_cpu for the next calculation. At this
point, we also need update the new trg_cpu as backup_cpu to make sure the
subsequent calculation of energy_diff() is correct.

Signed-off-by: Ke Wang <ke.wang@spreadtrum.com>
This commit is contained in:
Ke Wang 2017-10-30 17:38:16 +08:00 • committed by Todd Kjos
parent 1cb87c38cb
commit 7d5a251c66
1 changed files with 1 additions and 0 deletions
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kernel/sched/fair.c
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@ -6723,6 +6723,7 @@ static int select_energy_cpu_brute(struct task_struct *p, int prev_cpu, int sync
/* No energy saving for target_cpu, try backup */
target_cpu = tmp_backup;
eenv.dst_cpu = target_cpu;
eenv.trg_cpu = target_cpu;
if (tmp_backup < 0 ||
tmp_backup == prev_cpu ||
energy_diff(&eenv) >= 0) {