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authorDavidlohr Bueso <dave@stgolabs.net>2014-09-29 06:14:23 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-09-30 00:10:00 -0700
commite34191fad8e5d9fe4e76f6d03b5e29e3eae7535a (patch)
treebdf4b88a473d2a7c416cf44dc826cb8393cb0b4a /Documentation/locking
parentdd56af42bd829c6e770ed69812bd65a04eaeb1e4 (diff)
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locktorture: Support rwlocks
Add a "rw_lock" torture test to stress kernel rwlocks and their irq variant. Reader critical regions are 5x longer than writers. As such a similar ratio of lock acquisitions is seen in the statistics. In the case of massive contention, both hold the lock for 1/10 of a second. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation/locking')
-rw-r--r--Documentation/locking/locktorture.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/locking/locktorture.txt b/Documentation/locking/locktorture.txt
index be715015e0f7..619f2bb136a5 100644
--- a/Documentation/locking/locktorture.txt
+++ b/Documentation/locking/locktorture.txt
@@ -45,6 +45,11 @@ torture_type Type of lock to torture. By default, only spinlocks will
o "spin_lock_irq": spin_lock_irq() and spin_unlock_irq()
pairs.
+ o "rw_lock": read/write lock() and unlock() rwlock pairs.
+
+ o "rw_lock_irq": read/write lock_irq() and unlock_irq()
+ rwlock pairs.
+
o "mutex_lock": mutex_lock() and mutex_unlock() pairs.
o "rwsem_lock": read/write down() and up() semaphore pairs.