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author | Colin Cross <ccross@android.com> | 2013-05-06 23:50:18 +0000 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-05-12 14:16:22 +0200 |
commit | 56467c7697f5aef6974501fbe2c3e63674583549 (patch) | |
tree | 28f4d239cfa4f3821009b5edb0023266cc5b2563 /kernel/hrtimer.c | |
parent | 9745cdb36da83aeec198650b410ca06304cf7928 (diff) | |
download | op-kernel-dev-56467c7697f5aef6974501fbe2c3e63674583549.zip op-kernel-dev-56467c7697f5aef6974501fbe2c3e63674583549.tar.gz |
futex: use freezable blocking call
Avoid waking up every thread sleeping in a futex_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.
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Darren Hart <dvhart@linux.intel.com>
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')
0 files changed, 0 insertions, 0 deletions