Srivatsa Vaddagiri
authored
Enabling SCHED_HRTICK currently results in rq->lock recursion and a hard
hang at bootup. Essentially try_to_wakeup() grabs rq->lock and tries
arming a hrtimer via hrtimer_restart(), which deep down tries waking up
ksoftirqd, which leads to a recursive call to try_to_wakeup() and thus
attempt to take rq->lock recursively!!
This is fixed by having scheduler queue hrtimer via
__hrtimer_start_range_ns() which avoids waking up ksoftirqd.
Signed-off-by: 
Srivatsa Vaddagiri <vatsa@codeaurora.org>
Change-Id: I11a13be1d9db3a749614ccf3d4f5fb7bf6f18fa1| Name | Last commit | Last update |
|---|---|---|
| .. | ||
| Makefile | ||
| auto_group.c | ||
| auto_group.h | ||
| clock.c | ||
| core.c | ||
| cpupri.c | ||
| cpupri.h | ||
| debug.c | ||
| fair.c | ||
| features.h | ||
| idle_task.c | ||
| rt.c | ||
| sched.h | ||
| sched_avg.c | ||
| stats.c | ||
| stats.h | ||
| stop_task.c | ||