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ANDROID: sched: Add env->cpus to android_rvh_sched_nohz_balancer_kick

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android_rvh_sched_nohz_balancer_kick hook allows vendor modules to
select the busiest CPU in a group during load balance. When the
load balancer could not pull tasks from this busiest CPU due to
affinity restriction, the CPU is cleared from env->cpu. This must
be passed to the vendor module, otherwise we keep selecting the
exempted CPU as the busiest CPU.

Bug: 174338902
Change-Id: Iedaa389a51849da4c3e094d731fe5e39cd909d81
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti
2020-11-27 18:22:13 +05:30
committed by Quentin Perret
parent 5b0b1850d2
commit dc543a5b2a
2 changed files with 6 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
include/trace/hooks/sched.h
View File

@@ -92,8 +92,9 @@ DECLARE_RESTRICTED_HOOK(android_rvh_sched_nohz_balancer_kick,
DECLARE_RESTRICTED_HOOK(android_rvh_find_busiest_queue,
TP_PROTO(int dst_cpu, struct sched_group *group,
struct rq **busiest, int *done),
TP_ARGS(dst_cpu, group, busiest, done), 1);
struct cpumask *env_cpus, struct rq **busiest,
int *done),
TP_ARGS(dst_cpu, group, env_cpus, busiest, done), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_migrate_queued_task,
TP_PROTO(struct rq *rq, struct rq_flags *rf,
@@ -119,7 +120,7 @@ DECLARE_RESTRICTED_HOOK(android_rvh_migrate_queued_task,
#define trace_android_vh_jiffies_update(unused)
#define trace_android_rvh_sched_newidle_balance(this_rq, rf, pulled_task, done)
#define trace_android_rvh_sched_nohz_balancer_kick(rq, flags, done)
#define trace_android_rvh_find_busiest_queue(dst_cpu, group, busiest, done)
#define trace_android_rvh_find_busiest_queue(dst_cpu, group, env_cpus, busiest, done)
#define trace_android_rvh_migrate_queued_task(rq, rf, p, new_cpu, detached)
#endif
#endif /* _TRACE_HOOK_SCHED_H */

3
kernel/sched/fair.c
View File

@@ -9393,7 +9393,8 @@ static struct rq *find_busiest_queue(struct lb_env *env,
unsigned int busiest_nr = 0;
int i, done = 0;
trace_android_rvh_find_busiest_queue(env->dst_cpu, group, &busiest, &done);
trace_android_rvh_find_busiest_queue(env->dst_cpu, group, env->cpus,
&busiest, &done);
if (done)
return busiest;