diff options
| author | Srivatsa Vaddagiri <vatsa@codeaurora.org> | 2014-08-18 13:48:47 +0530 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 20:00:27 -0700 |
| commit | 2a7d718b3d7aed81d36132bf03e6dc7ddb4587ed (patch) | |
| tree | f39e52c8da96f8b82f373ff23889fc6d62297b11 /include/linux | |
| parent | dfeae566bbaf9dafeb7e4eca56fe12a793c69ad2 (diff) | |
sched: window-stats: Fix exit race
Exiting tasks are removed from tasklist and hence at some point will
become invisible to do_each_thread/for_each_thread task iterators.
This breaks the functionality of reset_all_windows_stats() which *has*
to reset stats for *all* tasks.
This patch causes exiting tasks stats to be reset *before* they are
removed from tasklist. DONT_ACCOUNT bit in exiting task's ravg.flags
is also marked so that their remaining execution time is not accounted
in cpu busy time counters (rq->curr/prev_runnable_sum).
reset_all_windows_stats() is thus guaranteed to return with all task's
stats reset to 0.
Change-Id: I5f101156a4f958c1b3f31eb0db8cd06e621b75e9
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/sched.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 62bf15ff160d..ae6fddd190f0 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2533,6 +2533,11 @@ extern void wake_up_new_task(struct task_struct *tsk); #endif extern int sched_fork(unsigned long clone_flags, struct task_struct *p); extern void sched_dead(struct task_struct *p); +#if defined(CONFIG_SCHED_HMP) || defined(CONFIG_SCHED_FREQ_INPUT) +extern void sched_exit(struct task_struct *p); +#else +static inline void sched_exit(struct task_struct *p) { } +#endif extern void proc_caches_init(void); extern void flush_signals(struct task_struct *); |