If users require SVM to takeover work, colo incoming thread should
exit from loop while failover BH helps backing to migration incoming
coroutine.
Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com>
Signed-off-by: Li Zhijian <lizhij...@cn.fujitsu.com>
---
migration/colo.c | 42 +++++++++++++++++++++++++++++++++++++++---
1 file changed, 39 insertions(+), 3 deletions(-)
diff --git a/migration/colo.c b/migration/colo.c
index 7a42fc6..f31e957 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -46,6 +46,33 @@ static bool colo_runstate_is_stopped(void)
return runstate_check(RUN_STATE_COLO) || !runstate_is_running();
}
+static void secondary_vm_do_failover(void)
+{
+ int old_state;
+ MigrationIncomingState *mis = migration_incoming_get_current();
+
+ migrate_set_state(&mis->state, MIGRATION_STATUS_COLO,
+ MIGRATION_STATUS_COMPLETED);
+
+ if (!autostart) {
+ error_report("\"-S\" qemu option will be ignored in secondary side");
+ /* recover runstate to normal migration finish state */
+ autostart = true;
+ }
+
+ old_state = failover_set_state(FAILOVER_STATUS_HANDLING,
+ FAILOVER_STATUS_COMPLETED);
+ if (old_state != FAILOVER_STATUS_HANDLING) {
+ error_report("Serious error while do failover for secondary VM,"
+ "old_state: %d", old_state);
+ return;
+ }
+ /* For Secondary VM, jump to incoming co */
+ if (mis->migration_incoming_co) {
+ qemu_coroutine_enter(mis->migration_incoming_co, NULL);
+ }
+}
+
static void primary_vm_do_failover(void)
{
MigrationState *s = migrate_get_current();
@@ -74,6 +101,8 @@ void colo_do_failover(MigrationState *s)
if (get_colo_mode() == COLO_MODE_PRIMARY) {
primary_vm_do_failover();
+ } else {
+ secondary_vm_do_failover();
}
}
@@ -404,6 +433,12 @@ void *colo_process_incoming_thread(void *opaque)
continue;
}
}
+
+ if (failover_request_is_active()) {
+ error_report("failover request");
+ goto out;
+ }
+
/* FIXME: This is unnecessary for periodic checkpoint mode */
ret = colo_ctl_put(mis->to_src_file, COLO_COMMAND_CHECKPOINT_REPLY, 0);
if (ret < 0) {
@@ -473,10 +508,11 @@ out:
qemu_fclose(fb);
}
qsb_free(buffer);
-
- qemu_mutex_lock_iothread();
+ /* Here, we can ensure BH is hold the global lock, and will join colo
+ * incoming thread, so here it is not necessary to lock here again,
+ * or there will be a deadlock error.
+ */
colo_release_ram_cache();
- qemu_mutex_unlock_iothread();
if (mis->to_src_file) {
qemu_fclose(mis->to_src_file);
--
1.8.3.1
