diff options
| author | Andrew Morton <akpm@osdl.org> | 2006-11-20 00:11:42 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2006-11-20 00:11:42 +0100 |
| commit | de6c0ccfa9ab24a9104c8791030e8ebecb1e2c5a (patch) | |
| tree | 0e710663a573a34b83c25828266e9da66077c191 /lib | |
| parent | 9e9c71470300baacb977ef0f332038691f8dc46a (diff) | |
disable debugging version of write_lock()
We've confirmed that the debug version of write_lock() can get stuck for long
enough to cause NMI watchdog timeouts and hence a crash.
We don't know why, yet. Disable it for now.
Also disable the similar read_lock() code. Just in case.
Thanks to Dave Olson <olson@unixfolk.com> for reporting and testing.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/spinlock_debug.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c index d8b6bb419d49..5cbcb806b082 100644 --- a/lib/spinlock_debug.c +++ b/lib/spinlock_debug.c @@ -137,6 +137,7 @@ static void rwlock_bug(rwlock_t *lock, const char *msg) #define RWLOCK_BUG_ON(cond, lock, msg) if (unlikely(cond)) rwlock_bug(lock, msg) +#if 0 /* __write_lock_debug() can lock up - maybe this can too? */ static void __read_lock_debug(rwlock_t *lock) { int print_once = 1; @@ -159,12 +160,12 @@ static void __read_lock_debug(rwlock_t *lock) } } } +#endif void _raw_read_lock(rwlock_t *lock) { RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic"); - if (unlikely(!__raw_read_trylock(&lock->raw_lock))) - __read_lock_debug(lock); + __raw_read_lock(&lock->raw_lock); } int _raw_read_trylock(rwlock_t *lock) @@ -210,6 +211,7 @@ static inline void debug_write_unlock(rwlock_t *lock) lock->owner_cpu = -1; } +#if 0 /* This can cause lockups */ static void __write_lock_debug(rwlock_t *lock) { int print_once = 1; @@ -232,12 +234,12 @@ static void __write_lock_debug(rwlock_t *lock) } } } +#endif void _raw_write_lock(rwlock_t *lock) { debug_write_lock_before(lock); - if (unlikely(!__raw_write_trylock(&lock->raw_lock))) - __write_lock_debug(lock); + __raw_write_lock(&lock->raw_lock); debug_write_lock_after(lock); } |