diff options
| author | Davidlohr Bueso <dave@stgolabs.net> | 2016-01-25 05:23:43 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-02-29 12:02:42 +0300 |
| commit | 1329ce6fbbe4536592dfcfc8d64d61bfeb598fe6 (patch) | |
| tree | 9e62701e84453ac079b56e5a69861a7498c1182c /drivers/phy/phy-berlin-sata.c | |
| parent | 32d62510f949d3c8e83b9b3b844a84446611661b (diff) | |
| download | linux-1329ce6fbbe4536592dfcfc8d64d61bfeb598fe6.tar.xz | |
locking/mutex: Allow next waiter lockless wakeup
Make use of wake-queues and enable the wakeup to occur after releasing the
wait_lock. This is similar to what we do with rtmutex top waiter,
slightly shortening the critical region and allow other waiters to
acquire the wait_lock sooner. In low contention cases it can also help
the recently woken waiter to find the wait_lock available (fastpath)
when it continues execution.
Reviewed-by: Waiman Long <Waiman.Long@hpe.com>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ding Tianhong <dingtianhong@huawei.com>
Cc: Jason Low <jason.low2@hp.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul E. McKenney <paulmck@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Waiman Long <waiman.long@hpe.com>
Cc: Will Deacon <Will.Deacon@arm.com>
Link: http://lkml.kernel.org/r/20160125022343.GA3322@linux-uzut.site
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/phy/phy-berlin-sata.c')
0 files changed, 0 insertions, 0 deletions