diff options
| author | Andres Freund <andres@anarazel.de> | 2020-06-08 15:25:49 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2020-06-17 12:51:20 -0700 |
| commit | b295f666b7f0d613cf3c9fef211408a2ac4ed1f6 (patch) | |
| tree | d47873cc67b0956fd825e5c2e0e3cec87aed251c | |
| parent | 44a6a82c791df00c2db7c64f26a63e64ae94bd46 (diff) | |
spinlock emulation: Fix bug when more than INT_MAX spinlocks are initialized.
Once the counter goes negative we ended up with spinlocks that errored
out on first use (due to check in tas_sema).
Author: Andres Freund
Reviewed-By: Robert Haas
Discussion: https://postgr.es/m/20200606023103.avzrctgv7476xj7i@alap3.anarazel.de
Backpatch: 9.5-
| -rw-r--r-- | src/backend/storage/lmgr/spin.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/storage/lmgr/spin.c b/src/backend/storage/lmgr/spin.c index 2c16938f5a9..b8e6ef5a115 100644 --- a/src/backend/storage/lmgr/spin.c +++ b/src/backend/storage/lmgr/spin.c @@ -106,7 +106,7 @@ SpinlockSemaInit(void) void s_init_lock_sema(volatile slock_t *lock, bool nested) { - static int counter = 0; + static uint32 counter = 0; *lock = ((++counter) % NUM_SPINLOCK_SEMAPHORES) + 1; } |