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Diffstat (limited to 'src/backend/storage/lmgr/deadlock.c')
| -rw-r--r-- | src/backend/storage/lmgr/deadlock.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/backend/storage/lmgr/deadlock.c b/src/backend/storage/lmgr/deadlock.c index f8c5df08e69..59060b6080f 100644 --- a/src/backend/storage/lmgr/deadlock.c +++ b/src/backend/storage/lmgr/deadlock.c @@ -555,6 +555,14 @@ FindLockCycleRecurseMember(PGPROC *checkProc, int numLockModes, lm; + /* + * The relation extension lock can never participate in actual deadlock + * cycle. See Assert in LockAcquireExtended. So, there is no advantage + * in checking wait edges from it. + */ + if (LOCK_LOCKTAG(*lock) == LOCKTAG_RELATION_EXTEND) + return false; + lockMethodTable = GetLocksMethodTable(lock); numLockModes = lockMethodTable->numLockModes; conflictMask = lockMethodTable->conflictTab[checkProc->waitLockMode]; |