On 04/27/2017 09:56 AM, Maxime Coquelin wrote:
Hi Zhiyong,
+Marc-André
On 04/27/2017 08:34 AM, Zhiyong Yang wrote:
vhost since dpdk17.02 + qemu2.7 and above will cause failures of
new connection when negotiating to set MQ. (one queue pair works
well).Because there exist some bugs in qemu code when introducing
VHOST_USER_PROTOCOL_F_REPLY_ACK to qemu. when dealing with the vhost
message VHOST_USER_SET_MEM_TABLE for the second time, qemu indeed
doesn't send the messge (The message needs to be sent only once)but
still will be waiting for dpdk's reply ack, then, qemu is always
freezing. DPDK code works in the right way.
I'm looking at Qemu's vhost_user_set_mem_table() function, but fail to
see how it could wait for the reply-ack if it didn't send the
VHOST_USER_SET_MEM_TABLE request before.
Oh, sorry, I get it now.
Are you working for a fix in Qemu, or have you already reported the
problem?
Thanks,
Maxime
