diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/storage/lmgr/lwlock.c | 27 |
1 files changed, 9 insertions, 18 deletions
diff --git a/src/backend/storage/lmgr/lwlock.c b/src/backend/storage/lmgr/lwlock.c index a377ad3313d..92e4fc7b0b1 100644 --- a/src/backend/storage/lmgr/lwlock.c +++ b/src/backend/storage/lmgr/lwlock.c @@ -1222,14 +1222,10 @@ LWLockAcquire(LWLock *lock, LWLockMode mode) /* * Wait until awakened. * - * Since we share the process wait semaphore with the regular lock - * manager and ProcWaitForSignal, and we may need to acquire an LWLock - * while one of those is pending, it is possible that we get awakened - * for a reason other than being signaled by LWLockRelease. If so, - * loop back and wait again. Once we've gotten the LWLock, - * re-increment the sema by the number of additional signals received, - * so that the lock manager or signal manager will see the received - * signal when it next waits. + * It is possible that we get awakened for a reason other than being + * signaled by LWLockRelease. If so, loop back and wait again. Once + * we've gotten the LWLock, re-increment the sema by the number of + * additional signals received. */ LOG_LWDEBUG("LWLockAcquire", lock, "waiting"); @@ -1389,8 +1385,7 @@ LWLockAcquireOrWait(LWLock *lock, LWLockMode mode) { /* * Wait until awakened. Like in LWLockAcquire, be prepared for - * bogus wakeups, because we share the semaphore with - * ProcWaitForSignal. + * bogus wakeups. */ LOG_LWDEBUG("LWLockAcquireOrWait", lock, "waiting"); @@ -1599,14 +1594,10 @@ LWLockWaitForVar(LWLock *lock, uint64 *valptr, uint64 oldval, uint64 *newval) /* * Wait until awakened. * - * Since we share the process wait semaphore with the regular lock - * manager and ProcWaitForSignal, and we may need to acquire an LWLock - * while one of those is pending, it is possible that we get awakened - * for a reason other than being signaled by LWLockRelease. If so, - * loop back and wait again. Once we've gotten the LWLock, - * re-increment the sema by the number of additional signals received, - * so that the lock manager or signal manager will see the received - * signal when it next waits. + * It is possible that we get awakened for a reason other than being + * signaled by LWLockRelease. If so, loop back and wait again. Once + * we've gotten the LWLock, re-increment the sema by the number of + * additional signals received. */ LOG_LWDEBUG("LWLockWaitForVar", lock, "waiting"); |