diff options
Diffstat (limited to 'src/include/txn.i')
| -rw-r--r-- | src/include/txn.i | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/include/txn.i b/src/include/txn.i index 40e2a6175d6..f5ca44c2ada 100644 --- a/src/include/txn.i +++ b/src/include/txn.i @@ -357,8 +357,13 @@ __wt_txn_id_alloc(WT_SESSION_IMPL *session, bool publish) WT_PUBLISH(WT_SESSION_TXN_STATE(session)->id, id); } - ++txn_global->current; - __wt_spin_unlock(session, &txn_global->id_lock); + /* + * Even though we are in a spinlock, readers are not. We rely on + * atomic reads of the current ID to create snapshots, so for unlocked + * reads to be well defined, we must use an atomic increment here. + */ + (void)__wt_atomic_addv64(&txn_global->current, 1); + __wt_spin_unlock(session, &txn_global->id_lock); return (id); } |