(off-topic) On 09/19, Oleg Nesterov wrote: > > @@ -570,8 +590,8 @@ void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, > victim = p; > } > > - /* mm cannot safely be dereferenced after task_unlock(victim) */ > mm = victim->mm; > + atomic_inc(&mm->mm_count); Btw, I think we need this change anyway. This is pure theoretical, but otherwise this task can exit and free its mm_struct right after task_unlock(), then this mm_struct can be reallocated and used by another task, so we can't trust the "p->mm == mm" check below. Oleg. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>