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migration: implement bi-directional RDMA QIOChannel

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This patch implements bi-directional RDMA QIOChannel. Because different
threads may access RDMAQIOChannel currently, this patch use RCU to protect it.

Signed-off-by: Lidong Chen <lidongchen@tencent.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Lidong Chen 2018-08-06 21:29:29 +08:00 • committed by Juan Quintela
parent 55cc1b5937
commit 74637e6f08
6 changed files with 183 additions and 26 deletions
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4
migration/ram.c
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@ -989,6 +989,7 @@ static void *multifd_send_thread(void *opaque)
int ret;
trace_multifd_send_thread_start(p->id);
rcu_register_thread();
if (multifd_send_initial_packet(p, &local_err) < 0) {
goto out;
@ -1051,6 +1052,7 @@ out:
p->running = false;
qemu_mutex_unlock(&p->mutex);
rcu_unregister_thread();
trace_multifd_send_thread_end(p->id, p->num_packets, p->num_pages);
return NULL;
@ -1220,6 +1222,7 @@ static void *multifd_recv_thread(void *opaque)
int ret;
trace_multifd_recv_thread_start(p->id);
rcu_register_thread();
while (true) {
uint32_t used;
@ -1266,6 +1269,7 @@ static void *multifd_recv_thread(void *opaque)
p->running = false;
qemu_mutex_unlock(&p->mutex);
rcu_unregister_thread();
trace_multifd_recv_thread_end(p->id, p->num_packets, p->num_pages);
return NULL;