Hi > KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> wrote: > > > dump_tasks() can call __task_cred() safely because we are holding > > tasklist_lock. but rcu lock validator don't have enough knowledge and > > it makes following annoying warning. > > No, it can't. The tasklist_lock is not protection against the creds changing > on another CPU. Thank you for correction. I suppose you mean I missed CONFIG_TREE_PREEMPT_RCU, right? As far as my grepping, other rcu implementation and spinlock use preempt_disable(). In other word, Can I assume usual distro user don't hit this issue? Thanks. -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>