diff options
| author | Colin Cross <ccross@android.com> | 2013-05-06 23:50:19 +0000 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2014-04-21 22:35:17 -0500 |
| commit | e13e5f8f7b261784e22c8dfeacfe3f55232948d3 (patch) | |
| tree | 2bf6e9447b8b48e7fef4ac09202d3966b7a66877 /kernel/hrtimer.c | |
| parent | 0d23f0ff4e8d8cdddb93fba62fc680e62ae08193 (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>
Diffstat (limited to 'kernel/hrtimer.c')
| -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 2288fbdada16..e268e269a695 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> @@ -1543,7 +1544,7 @@ 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; |