From: Evgeniy Polyakov <[EMAIL PROTECTED]> Date: Thu, 16 Mar 2006 12:42:40 +0300
> Why process should be there? It can request for data and sleep > away. ucopy is never used for async sockets - all needed for > transfer data is stored inside kevents. The point is that if tp->ucopy.task is non-NULL then process is there. You added the sock_async() test to such a code path. tcp_recvmsg() only sets that pointer when task is active in tcp_recvmsg(). If task sleeps, socket remains locked such that any TCP packet received will be added to prequeue. When task wakes up, it runs backlog with tp->ucopy.task still set. So it makes no sense to guard prequeue processing with sock_async() check when tp->ucopy.task != NULL tells the exact state. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
