On Thu, 9 Jun 2011 16:42:09 -0700 Ying Han <yinghan@xxxxxxxxxx> wrote: > ++cc Hugh who might have seen similar crashes on his machine. > Thank you for forwarding. Hmm. It seems the panic happens at khugepaged's page collapse_huge_page(). == count_vm_event(THP_COLLAPSE_ALLOC); if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) { == It passes target mm to memcg and memcg gets a cgroup by == mem = mem_cgroup_from_task(rcu_dereference(mm->owner)); == Panic here means....mm->owner's task_subsys_state contains bad pointer ? I'll dig. Thanks. -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>