diff options
| author | Colin Cross <ccross@android.com> | 2013-05-06 23:50:19 +0000 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 15:46:23 -0700 |
| commit | 98009ee43a64ddc88c6768a30267328b41e27acd (patch) | |
| tree | 5f9deb17f6ee3630a0df890872bb71246aed2544 | |
| parent | 5ccf7dfeea5b5e2e63a6d45e85335c788a69e7b2 (diff) | |
nanosleep: use freezable blocking call
Avoid waking up every thread sleeping in a nanosleep call during
suspend and resume by calling a freezable blocking call. Previous
patches modified the freezer to avoid sending wakeups to threads
that are blocked in freezable blocking calls.
This call was selected to be converted to a freezable call because
it doesn't hold any locks or release any resources when interrupted
that might be needed by another freezing task or a kernel driver
during suspend, and is a common site where idle userspace tasks are
blocked.
Change-Id: I93383201d4dd62130cd9a9153842d303fc2e2986
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | kernel/hrtimer.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index fd4b13b131f..3ee4d06c6fc 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -47,6 +47,7 @@ #include <linux/sched/sysctl.h> #include <linux/sched/rt.h> #include <linux/timer.h> +#include <linux/freezer.h> #include <asm/uaccess.h> @@ -1545,7 +1546,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod t->task = NULL; if (likely(t->task)) - schedule(); + freezable_schedule(); hrtimer_cancel(&t->timer); mode = HRTIMER_MODE_ABS; |