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ANDROID: sched: Update android_rvh_check_preempt_wakeup hook

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android_rvh_check_preempt_wakeup hook is in place to allow vendor
modules to force the running task preemption by the waking task.
Update the tracepoint to accept another input to not preempting
the current running task. The hook is moved further down so that
it can be updated to pass the sched_entity structure corresponding
to waking and running tasks in the next patch.

Bug: 184575210
Change-Id: Id4f45ba2819802636b6b86ed34c124771d0d69eb
Signed-off-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
Signed-off-by: Shaleen Agrawal <shalagra@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti
2021-04-06 06:34:36 +05:30
committed by Todd Kjos
parent 632bb51100
commit f7ede2b168
2 changed files with 8 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/trace/hooks/sched.h
View File

@@ -255,8 +255,8 @@ DECLARE_RESTRICTED_HOOK(android_rvh_pick_next_entity,
TP_ARGS(cfs_rq, curr, se), 1);
DECLARE_RESTRICTED_HOOK(android_rvh_check_preempt_wakeup,
TP_PROTO(struct rq *rq, struct task_struct *p, bool *preempt),
TP_ARGS(rq, p, preempt), 1);
TP_PROTO(struct rq *rq, struct task_struct *p, bool *preempt, bool *nopreempt),
TP_ARGS(rq, p, preempt, nopreempt), 1);
#endif /* _TRACE_HOOK_SCHED_H */
/* This part must be outside protection */

9
kernel/sched/fair.c
View File

@@ -7265,9 +7265,6 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_
if (unlikely(p->policy != SCHED_NORMAL) || !sched_feat(WAKEUP_PREEMPTION))
return;
trace_android_rvh_check_preempt_wakeup(rq, p, &preempt);
if (preempt)
goto preempt;
find_matching_se(&se, &pse);
BUG_ON(!pse);
@@ -7284,6 +7281,12 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_
return;
update_curr(cfs_rq_of(se));
trace_android_rvh_check_preempt_wakeup(rq, p, &preempt, &ignore);
if (preempt)
goto preempt;
if (ignore)
return;
if (wakeup_preempt_entity(se, pse) == 1) {
/*
* Bias pick_next to pick the sched entity that is