diff options
| author | Colin Cross <ccross@android.com> | 2013-05-06 23:50:20 +0000 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 15:46:24 -0700 |
| commit | e85cba35b3676eb84d16e205bd278a637a5e3b58 (patch) | |
| tree | 09701077f028b6a9d09d84607068027c378d5aa6 | |
| parent | 98009ee43a64ddc88c6768a30267328b41e27acd (diff) | |
sigtimedwait: use freezable blocking call
Avoid waking up every thread sleeping in a sigtimedwait 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: Ic27469b60a67d50cdc0d0c78975951a99c25adcd
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | kernel/signal.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 113411bfe8b..50e41075ac7 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2848,7 +2848,7 @@ int do_sigtimedwait(const sigset_t *which, siginfo_t *info, recalc_sigpending(); spin_unlock_irq(&tsk->sighand->siglock); - timeout = schedule_timeout_interruptible(timeout); + timeout = freezable_schedule_timeout_interruptible(timeout); spin_lock_irq(&tsk->sighand->siglock); __set_task_blocked(tsk, &tsk->real_blocked); |