[PATCH 2/2] migration: report multiFd related thread pid to libvirt

[Jiang Jiacheng]

From: Zheng Chuan <zhengchuan@huawei.com>

Report multiFd related thread pid to libvirt in order to
pin multiFd thread to different cpu.
---
 migration/multifd.c |  4 ++++
 qapi/migration.json | 12 ++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/migration/multifd.c b/migration/multifd.c
index 000ca4d4ec..f3f7e8ae31 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -17,6 +17,7 @@
 #include "exec/ramblock.h"
 #include "qemu/error-report.h"
 #include "qapi/error.h"
+#include "qapi/qapi-events-migration.h"
 #include "ram.h"
 #include "migration.h"
 #include "socket.h"
@@ -650,6 +651,9 @@ static void *multifd_send_thread(void *opaque)
     int ret = 0;
     bool use_zero_copy_send = migrate_use_zero_copy_send();
 
+    /* report multifd thread pid to libvirt */
+    qapi_event_send_migration_multifd_pid(qemu_get_thread_id());
+
     trace_multifd_send_thread_start(p->id);
     rcu_register_thread();
 
diff --git a/qapi/migration.json b/qapi/migration.json
index aafc940617..33fc319329 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -1286,6 +1286,18 @@
 { 'event': 'MIGRATION_PASS',
   'data': { 'pass': 'int' } }
 
+##
+# @MIGRATION_MULTIFD_PID:
+#
+# Emitted when multifd thread appear
+#
+# @pid: pid of multifd thread
+#
+# Since: 7.2
+##
+{ 'event': 'MIGRATION_MULTIFD_PID',
+  'data': { 'pid': 'int' } }
+
 ##
 # @MIGRATION_PID:
 #
-- 
2.33.0