During overload conditions of the IPC system and the usage of the timer
system by ipc threads and totem threads simultaneously, a lock ordering
condition was found resulting in complete deadlock.
Patch attached to fix.
Index: exec/timer.c
===================================================================
--- exec/timer.c (revision 1641)
+++ exec/timer.c (working copy)
@@ -126,13 +126,13 @@
if (fds == -1) {
goto retry_poll;
}
+ timer_serialize_lock_fn ();
pthread_mutex_lock (&timer_mutex);
- timer_serialize_lock_fn ();
timerlist_expire (&timers_timerlist);
+ pthread_mutex_unlock (&timer_mutex);
timer_serialize_unlock_fn ();
- pthread_mutex_unlock (&timer_mutex);
}
pthread_exit (0);
_______________________________________________
Openais mailing list
[email protected]
https://lists.linux-foundation.org/mailman/listinfo/openais
