diff options
Diffstat (limited to 'sys/kern/kern_mutex.c')
| -rw-r--r-- | sys/kern/kern_mutex.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/kern/kern_mutex.c b/sys/kern/kern_mutex.c index 49f9c59..17c72eb 100644 --- a/sys/kern/kern_mutex.c +++ b/sys/kern/kern_mutex.c @@ -399,8 +399,11 @@ _mtx_lock_sleep(struct mtx *m, uintptr_t tid, int opts, const char *file, #ifdef ADAPTIVE_MUTEXES /* - * If the current owner of the lock is executing on another - * CPU quit the hard path and try to spin. + * The current lock owner might have started executing + * on another CPU (or the lock could have changed + * owners) while we were waiting on the turnstile + * chain lock. If so, drop the turnstile lock and try + * again. */ owner = (struct thread *)(v & ~MTX_FLAGMASK); if (TD_IS_RUNNING(owner)) { |
