diff options
| author | Colin Cross <ccross@android.com> | 2013-05-06 23:50:16 +0000 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 15:44:19 -0700 |
| commit | 8f02557bee13b54d4e3f465a40b065d7454512a7 (patch) | |
| tree | ef764d01a563eb8ef644bf51a4b196734594bf1b /fs | |
| parent | a7173a0d11b55c8f5f1cf76662b1e70c19e34b00 (diff) | |
| download | olio-linux-3.10-8f02557bee13b54d4e3f465a40b065d7454512a7.tar.xz olio-linux-3.10-8f02557bee13b54d4e3f465a40b065d7454512a7.zip | |
epoll: use freezable blocking call
Avoid waking up every thread sleeping in an epoll_wait 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: I848d08d28c89302fd42bbbdfa76489a474ab27bf
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>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/eventpoll.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index deecc7294a6..0cff4434880 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -34,6 +34,7 @@ #include <linux/mutex.h> #include <linux/anon_inodes.h> #include <linux/device.h> +#include <linux/freezer.h> #include <asm/uaccess.h> #include <asm/io.h> #include <asm/mman.h> @@ -1602,7 +1603,8 @@ fetch_events: } spin_unlock_irqrestore(&ep->lock, flags); - if (!schedule_hrtimeout_range(to, slack, HRTIMER_MODE_ABS)) + if (!freezable_schedule_hrtimeout_range(to, slack, + HRTIMER_MODE_ABS)) timed_out = 1; spin_lock_irqsave(&ep->lock, flags); |