On 10/18, Peter Zijlstra wrote: > > So you worry about the refcount doing 0->1 ? In which case the above is > still wrong and we should be using atomic_inc_not_zero() in order to > acquire the reference count.
It is actually worse, please see my reply to Kirill. We simply can't dereference foreign_rq->curr lockless. Again, task_struct is only protected by RCU if it was found on a RCU protected list. rq->curr is not protected by rcu. Perhaps we have to change this... but this will be a bit unfortunate. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
