postgres.git / summary / log / commit / refs

commit    98d5b084d23b0304569ef2c1b4794754166cf0a5
Author:   Andres Freund <andres@anarazel.de>
Date:     Tue Sep 22 09:05:48 2015 +0000
First released in: 9.6.0, 9.5.0

    Correct value of LW_SHARED_MASK.
    
    The previous wrong value lead to wrong LOCK_DEBUG output, never showing
    any shared lock holders.
    
    Reported-By: Alexander Korotkov
    Discussion: CAPpHfdsPmWqz9FB0AnxJrwp1=KLF0n=-iB+QvR0Q8GSmpFVdUQ@mail.gmail.com
    Backpatch: 9.5, where the bug was introduced.


 src/backend/storage/lmgr/lwlock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backend/storage/lmgr/lwlock.c b/src/backend/storage/lmgr/lwlock.c
index 9179d1b356b..fd4b479f10c 100644
--- a/src/backend/storage/lmgr/lwlock.c
+++ b/src/backend/storage/lmgr/lwlock.c
@@ -107,7 +107,7 @@ extern slock_t *ShmemLock;
 
 #define LW_LOCK_MASK				((uint32) ((1 << 25)-1))
 /* Must be greater than MAX_BACKENDS - which is 2^23-1, so we're fine. */
-#define LW_SHARED_MASK				((uint32)(1 << 23))
+#define LW_SHARED_MASK				((uint32) ((1 << 24)-1))
 
 /*
  * This is indexed by tranche ID and stores metadata for all tranches known


[parent: d9cb34abb40c]