diff options
| author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 11:24:33 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-04 02:27:01 +0400 |
| commit | 9a11b49a805665e13a56aa067afaf81d43ec1514 (patch) | |
| tree | bf499956e3f67d1211d68ab1e2eb76645f453dfb /include/linux/mutex-debug.h | |
| parent | fb7e42413a098cc45b3adf858da290033af62bae (diff) | |
| download | linux-9a11b49a805665e13a56aa067afaf81d43ec1514.tar.xz | |
[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/mutex-debug.h')
| -rw-r--r-- | include/linux/mutex-debug.h | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/include/linux/mutex-debug.h b/include/linux/mutex-debug.h index 8b5769f00467..70a26091fc73 100644 --- a/include/linux/mutex-debug.h +++ b/include/linux/mutex-debug.h @@ -7,17 +7,11 @@ * Mutexes - debugging helpers: */ -#define __DEBUG_MUTEX_INITIALIZER(lockname) \ - , .held_list = LIST_HEAD_INIT(lockname.held_list), \ - .name = #lockname , .magic = &lockname +#define __DEBUG_MUTEX_INITIALIZER(lockname) \ + , .magic = &lockname -#define mutex_init(sem) __mutex_init(sem, __FUNCTION__) +#define mutex_init(sem) __mutex_init(sem, __FILE__":"#sem) extern void FASTCALL(mutex_destroy(struct mutex *lock)); -extern void mutex_debug_show_all_locks(void); -extern void mutex_debug_show_held_locks(struct task_struct *filter); -extern void mutex_debug_check_no_locks_held(struct task_struct *task); -extern void mutex_debug_check_no_locks_freed(const void *from, unsigned long len); - #endif |