Hi Sergey, Cough... I hoped that I will send at least some changes before another reminder, but I am late again ;) On 05/27, Sergey Dyasly wrote: > > Adding thread_head into task_struct->signal would be the best solution imho. > This way list will be properly protected by rcu_read_lock(). But you called it > "really painful". I guess that's because all users of while_each_thread(g, t) > must be modified with 'g' pointing to the new thread_head. And I've counted > 50 usages of while_each_thread() across the kernel. Plus sometimes we need to iterate the group starting from non-leader. And we need to keep both old/new lists before we convert all users, and some other complications. I hope I'll send some preparational patches today, I have already started this (today ;). 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>