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sched/walt: when idle task is scheduled cra must be zero

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Validate that cumulative_runnable_avg is zero when the next
scheduled task is the idle task.

Change-Id: Ia14f9c773c48bf44dfb71080b9360dd473b73923
Signed-off-by: Stephen Dickey <dickey@codeaurora.org>
This commit is contained in:
Stephen Dickey 2021-08-04 21:35:46 -07:00 committed by Rishabh Bhatnagar
parent 5f9174b2f3
commit a7c3f86453
1 changed files with 6 additions and 0 deletions
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6
kernel/sched/walt/walt.c
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@ -4031,6 +4031,7 @@ static void android_rvh_schedule(void *unused, struct task_struct *prev,
{
u64 wallclock = walt_ktime_get_ns();
struct walt_task_struct *wts = (struct walt_task_struct *) prev->android_vendor_data1;
struct walt_rq *wrq = (struct walt_rq *) rq->android_vendor_data1;
if (unlikely(walt_disabled))
return;
@ -4039,6 +4040,11 @@ static void android_rvh_schedule(void *unused, struct task_struct *prev,
wts->last_sleep_ts = wallclock;
walt_update_task_ravg(prev, rq, PUT_PREV_TASK, wallclock, 0);
walt_update_task_ravg(next, rq, PICK_NEXT_TASK, wallclock, 0);
if (is_idle_task(next))
if (wrq->walt_stats.cumulative_runnable_avg_scaled != 0) {
printk_deferred("WALT-BUG next=idle cra!=0\n");
SCHED_BUG_ON(1);
}
} else {
walt_update_task_ravg(prev, rq, TASK_UPDATE, wallclock, 0);
}