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authorColin Cross <ccross@android.com>2013-05-06 23:50:17 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-05-12 14:16:22 +0200
commit9745cdb36da83aeec198650b410ca06304cf7928 (patch)
tree7891a89a28cfc5105d0a9416f46983b5219c30fe /fs/select.c
parent1c441e921201d523b5a6036aea22b0b426bf1af2 (diff)
downloadop-kernel-dev-9745cdb36da83aeec198650b410ca06304cf7928.zip
op-kernel-dev-9745cdb36da83aeec198650b410ca06304cf7928.tar.gz
select: use freezable blocking call
Avoid waking up every thread sleeping in a select 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 <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/select.c')
-rw-r--r--fs/select.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/select.c b/fs/select.c
index 8c1c96c..6b14dc7 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -27,6 +27,7 @@
#include <linux/rcupdate.h>
#include <linux/hrtimer.h>
#include <linux/sched/rt.h>
+#include <linux/freezer.h>
#include <asm/uaccess.h>
@@ -236,7 +237,8 @@ int poll_schedule_timeout(struct poll_wqueues *pwq, int state,
set_current_state(state);
if (!pwq->triggered)
- rc = schedule_hrtimeout_range(expires, slack, HRTIMER_MODE_ABS);
+ rc = freezable_schedule_hrtimeout_range(expires, slack,
+ HRTIMER_MODE_ABS);
__set_current_state(TASK_RUNNING);
/*
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