On Fri, Apr 04, 2008 at 03:30:50PM -0700, Christoph Lameter wrote: > + mm_lock(mm); > + e->next = mm->emm_notifier; > + /* > + * The update to emm_notifier (e->next) must be visible > + * before the pointer becomes visible. > + * rcu_assign_pointer() does exactly what we need. > + */ > + rcu_assign_pointer(mm->emm_notifier, e); > + mm_unlock(mm);
My mm_lock solution makes all rcu serialization an unnecessary overhead so you should remove it like I already did in #v11. If it wasn't the case, then mm_lock wouldn't be a definitive fix for the race. > + e = rcu_dereference(e->next); Same here. _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
