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| author |   Peter Zijlstra <peterz@infradead.org> | 2014-01-29 12:51:42 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2014-03-11 12:14:56 +0100 |
| commit | fb0527bd5ea99bfeb2dd91e3c1433ecf745d6b99 (patch) | |
| tree | b3ab4c067c035688d4295fdcadf00170465db7df /include/linux/mutex.h | |
| parent | locking/mutexes: Unlock the mutex without the wait_lock (diff) | |
| download | linux-dev-fb0527bd5ea99bfeb2dd91e3c1433ecf745d6b99.tar.xz linux-dev-fb0527bd5ea99bfeb2dd91e3c1433ecf745d6b99.zip | |
locking/mutexes: Introduce cancelable MCS lock for adaptive spinning
Since we want a task waiting for a mutex_lock() to go to sleep and
reschedule on need_resched() we must be able to abort the
mcs_spin_lock() around the adaptive spin.
Therefore implement a cancelable mcs lock.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: chegu_vinod@hp.com
Cc: paulmck@linux.vnet.ibm.com
Cc: Waiman.Long@hp.com
Cc: torvalds@linux-foundation.org
Cc: tglx@linutronix.de
Cc: riel@redhat.com
Cc: akpm@linux-foundation.org
Cc: davidlohr@hp.com
Cc: hpa@zytor.com
Cc: andi@firstfloor.org
Cc: aswin@hp.com
Cc: scott.norton@hp.com
Cc: Jason Low <jason.low2@hp.com>
Link: http://lkml.kernel.org/n/tip-62hcl5wxydmjzd182zhvk89m@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/mutex.h')
| -rw-r--r-- | include/linux/mutex.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/mutex.h b/include/linux/mutex.h index c482e1d2cc49..11692dea18aa 100644 --- a/include/linux/mutex.h +++ b/include/linux/mutex.h @@ -46,7 +46,7 @@ * - detects multi-task circular deadlocks and prints out all affected * locks and tasks (and only those tasks) */ -struct mcs_spinlock; +struct optimistic_spin_queue; struct mutex { /* 1: unlocked, 0: locked, negative: locked, possible waiters */ atomic_t count; @@ -56,7 +56,7 @@ struct mutex { struct task_struct *owner; #endif #ifdef CONFIG_MUTEX_SPIN_ON_OWNER - struct mcs_spinlock *mcs_lock; /* Spinner MCS lock */ + struct optimistic_spin_queue *osq; /* Spinner MCS lock */ #endif #ifdef CONFIG_DEBUG_MUTEXES const char *name; |