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| author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 00:24:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:01 -0700 |
| commit | 9a11b49a805665e13a56aa067afaf81d43ec1514 (patch) | |
| tree | bf499956e3f67d1211d68ab1e2eb76645f453dfb /include/linux/rtmutex.h | |
| parent | fb7e42413a098cc45b3adf858da290033af62bae (diff) | |
| download | linux-9a11b49a805665e13a56aa067afaf81d43ec1514.tar.gz linux-9a11b49a805665e13a56aa067afaf81d43ec1514.tar.bz2 linux-9a11b49a805665e13a56aa067afaf81d43ec1514.zip | |
[PATCH] lockdep: better lock debugging
Generic lock debugging:
- generalized lock debugging framework. For example, a bug in one lock
subsystem turns off debugging in all lock subsystems.
- got rid of the caller address passing (__IP__/__IP_DECL__/etc.) from
the mutex/rtmutex debugging code: it caused way too much prototype
hackery, and lockdep will give the same information anyway.
- ability to do silent tests
- check lock freeing in vfree too.
- more finegrained debugging options, to allow distributions to
turn off more expensive debugging features.
There's no separate 'held mutexes' list anymore - but there's a 'held locks'
stack within lockdep, which unifies deadlock detection across all lock
classes. (this is independent of the lockdep validation stuff - lockdep first
checks whether we are holding a lock already)
Here are the current debugging options:
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_LOCK_ALLOC=y
which do:
config DEBUG_MUTEXES
bool "Mutex debugging, basic checks"
config DEBUG_LOCK_ALLOC
bool "Detect incorrect freeing of live mutexes"
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/rtmutex.h')
| -rw-r--r-- | include/linux/rtmutex.h | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h index fa4a3b82ba70..5d41dee82f80 100644 --- a/include/linux/rtmutex.h +++ b/include/linux/rtmutex.h @@ -29,8 +29,6 @@ struct rt_mutex { struct task_struct *owner; #ifdef CONFIG_DEBUG_RT_MUTEXES int save_state; - struct list_head held_list_entry; - unsigned long acquire_ip; const char *name, *file; int line; void *magic; @@ -98,14 +96,6 @@ extern int rt_mutex_trylock(struct rt_mutex *lock); extern void rt_mutex_unlock(struct rt_mutex *lock); -#ifdef CONFIG_DEBUG_RT_MUTEXES -# define INIT_RT_MUTEX_DEBUG(tsk) \ - .held_list_head = LIST_HEAD_INIT(tsk.held_list_head), \ - .held_list_lock = SPIN_LOCK_UNLOCKED -#else -# define INIT_RT_MUTEX_DEBUG(tsk) -#endif - #ifdef CONFIG_RT_MUTEXES # define INIT_RT_MUTEXES(tsk) \ .pi_waiters = PLIST_HEAD_INIT(tsk.pi_waiters, tsk.pi_lock), \ |