diff options
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 /kernel/exit.c | |
parent | fb7e42413a098cc45b3adf858da290033af62bae (diff) | |
download | kernel_samsung_tuna-9a11b49a805665e13a56aa067afaf81d43ec1514.zip kernel_samsung_tuna-9a11b49a805665e13a56aa067afaf81d43ec1514.tar.gz kernel_samsung_tuna-9a11b49a805665e13a56aa067afaf81d43ec1514.tar.bz2 |
[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 'kernel/exit.c')
-rw-r--r-- | kernel/exit.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/kernel/exit.c b/kernel/exit.c index 7f7ef22..c595db1 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -933,10 +933,9 @@ fastcall NORET_TYPE void do_exit(long code) if (unlikely(current->pi_state_cache)) kfree(current->pi_state_cache); /* - * If DEBUG_MUTEXES is on, make sure we are holding no locks: + * Make sure we are holding no locks: */ - mutex_debug_check_no_locks_held(tsk); - rt_mutex_debug_check_no_locks_held(tsk); + debug_check_no_locks_held(tsk); if (tsk->io_context) exit_io_context(); |