diff options
Diffstat (limited to 'src/third_party/wiredtiger/src/os_posix/os_mtx_cond.c')
| -rw-r--r-- | src/third_party/wiredtiger/src/os_posix/os_mtx_cond.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/third_party/wiredtiger/src/os_posix/os_mtx_cond.c b/src/third_party/wiredtiger/src/os_posix/os_mtx_cond.c index d4ee532a2af..be8b1abda31 100644 --- a/src/third_party/wiredtiger/src/os_posix/os_mtx_cond.c +++ b/src/third_party/wiredtiger/src/os_posix/os_mtx_cond.c @@ -107,10 +107,13 @@ __wt_cond_signal(WT_SESSION_IMPL *session, WT_CONDVAR *cond) __wt_verbose(session, WT_VERB_MUTEX, "signal %s", cond->name); /* - * Our callers are often setting flags to cause a thread to exit. Add - * a barrier to ensure the flags are seen by the threads. + * Our callers often set flags to cause a thread to exit. Add a barrier + * to ensure exit flags are seen by the sleeping threads, otherwise we + * can wake up a thread, it immediately goes back to sleep, and we'll + * hang. Use a full barrier (we may not write before waiting on thread + * join). */ - WT_WRITE_BARRIER(); + WT_FULL_BARRIER(); /* * Fast path if we are in (or can enter), a state where the next waiter |