Re: [libvirt] [PATCH v1] libvirtd: Increase NL buffer size for lots of interface

1. When switching CPUs to offline/online in a system more than 128 cpus 2. When using virsh to destroy domain in a system with more interface All of above happens nl_recv returned with error: No buffer space available. This patch set socket buffer size to 128K and turn on message peeking for nl_recv, as this would solve this problem totally and permanetly. LTC-Bugzilla: #133359 #125768 Signed-off-by: Leno Hou <houqy(a)linux.vnet.ibm.com&gt; Cc: Wenyi Gao <wenyi(a)linux.vnet.ibm.com&gt; --- src/util/virnetlink.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/util/virnetlink.c b/src/util/virnetlink.c index 679b48e..c8c9fe0 100644 --- a/src/util/virnetlink.c +++ b/src/util/virnetlink.c @@ -696,6 +696,14 @@ virNetlinkEventServiceStart(unsigned int protocol, unsigned int groups) goto error_server; } + if (nl_socket_set_buffer_size(srv->netlinknh, 131702, 0) < 0) { + virReportSystemError(errno, + "%s",_("cannot set netlink socket buffer size to 128k")); + goto error_server; + } + + nl_socket_enable_msg_peek(srv->netlinknh); + if ((srv->eventwatch = virEventAddHandle(fd, VIR_EVENT_HANDLE_READABLE, virNetlinkEventCallback,