diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/storage/ipc/procarray.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/src/backend/storage/ipc/procarray.c b/src/backend/storage/ipc/procarray.c index bd20497d81a..bf2f4dbed2d 100644 --- a/src/backend/storage/ipc/procarray.c +++ b/src/backend/storage/ipc/procarray.c @@ -542,14 +542,8 @@ ProcArrayGroupClearXid(PGPROC *proc, TransactionId latestXid) * group XID clearing, saving a pointer to the head of the list. Trying * to pop elements one at a time could lead to an ABA problem. */ - while (true) - { - nextidx = pg_atomic_read_u32(&procglobal->procArrayGroupFirst); - if (pg_atomic_compare_exchange_u32(&procglobal->procArrayGroupFirst, - &nextidx, - INVALID_PGPROCNO)) - break; - } + nextidx = pg_atomic_exchange_u32(&procglobal->procArrayGroupFirst, + INVALID_PGPROCNO); /* Remember head of list so we can perform wakeups after dropping lock. */ wakeidx = nextidx; |