On Mon, Jan 11, 2016 at 02:59:00PM +0800, Leno Hou wrote:
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 sets the socket buffer size to 128K and turns on message peeking for nl_recv,as this would solve this problem totally and permanetly.
So if none of the above is true/happening...
Signed-off-by: Leno Hou <houqy@xxxxxxxxxxxxxxxxxx>
Cc: Wenyi Gao <wenyi@xxxxxxxxxxxxxxxxxx>
CC: Laine Stump <laine@xxxxxxxxx>
CC: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
src/util/virnetlink.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/src/util/virnetlink.c b/src/util/virnetlink.c
index 679b48e..ea65cbc 100644
--- a/src/util/virnetlink.c
+++ b/src/util/virnetlink.c
@@ -65,10 +65,12 @@ struct virNetlinkEventHandle {
# ifdef HAVE_LIBNL1
# define virNetlinkAlloc nl_handle_alloc
+# define virSocketSetBufferSize nl_set_buffer_size
# define virNetlinkFree nl_handle_destroy
typedef struct nl_handle virNetlinkHandle;
# else
# define virNetlinkAlloc nl_socket_alloc
+# define virSocketSetBufferSize nl_socket_set_buffer_size
# define virNetlinkFree nl_socket_free
typedef struct nl_sock virNetlinkHandle;
# endif
@@ -696,6 +698,14 @@ virNetlinkEventServiceStart(unsigned int protocol, unsigned int groups)
goto error_server;
}
+ if (virSocketSetBufferSize(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);
+
... shouldn't this be non-fatal just in case?
if ((srv->eventwatch = virEventAddHandle(fd,
VIR_EVENT_HANDLE_READABLE,
virNetlinkEventCallback,
--
1.9.1
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