From b0f8c44f30e58c3aaaaaf864d5c3d3cc2e8a4c2d Mon Sep 17 00:00:00 2001 From: Colin Cross Date: Mon, 6 May 2013 23:50:19 +0000 Subject: [PATCH] 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. Acked-by: Tejun Heo Acked-by: Thomas Gleixner Signed-off-by: Colin Cross Signed-off-by: Rafael J. Wysocki --- kernel/hrtimer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index fd4b13b131f8..3ee4d06c6fc2 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -47,6 +47,7 @@ #include #include #include +#include #include @@ -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; -- 2.20.1