Hi All,
I met an issue when running DRBD in Xenserver with ovs-1.7.1. DRBD works fine
when creating and sync data. But when trying to down DRBD resource,
ovs-vswitchd hangs for about 20 minutes, then all network connections broken.
I add some debug trace, ovs-vswitchd finally stopped at sendmsg() for netlink
message. The call path is:
bridge_run_fast()->ofproto_run_fast()->run_fast()->handle_upcalls()->handle_miss_upcalls()->dpif_operate()->dpif_linux_operate__()->nl_sock_transact_multiple()->nl_sock_transact_multiple__()->sendmsg()
vswitchd stop here because sendmsg() does not return.
465 memset(&msg, 0, sizeof msg);
466 msg.msg_iov = iovs;
467 msg.msg_iovlen = n;
468 do {
469 error = sendmsg(sock->fd, &msg, 0) < 0 ? errno : 0;
470 } while (error == EINTR);
471
Several guys met similar issue before from Xen/DRBD's mail list, but the
solution is just stop OVS, use linux bridge. I am thinking the issue may
because before DRBD stop resource, it will do some cleanup for its netlink
socket, this conflict with OVS's handling?
Can anybody give some clues on how to debug this issue?
Many Thanks!
Tianpeng _______________________________________________
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