Dear, I have currently having troubles with a basic socket stress.
The socket are setup to use non-blocking I/O. During this stress-test, the kernel is running mbuf exhaustion, the goal is to see system limits. If the program make a write on a socket during this mbuf exhaustion, it become blocked in "write" system call. The status of the process is "zonelimit" and whole network I/O fall in timeout. I have found the root cause of the block : http://svnweb.freebsd.org/base/head/sys/kern/uipc_socket.c?view=markup#l1279 So, the question is : Why m_uiotombuf is called with a blocking parameter (M_WAITOK) even if is for a non-blocking socket ? Then, if M_NOWAIT is used, maybe it will be usefull to have an 'ENOMEM' error. Regards -- Alexandre Martins _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
