On 10/30/2016 05:46 AM, Amit Shah wrote:
From: zhanghailiang <address@hidden>
Add a new migration state: MIGRATION_STATUS_COLO. Migration source side
enters this state after the first live migration successfully finished
if COLO is enabled by command 'migrate_set_capability x-colo on'.
We reuse migration thread, so the process of checkpointing will be handled
in migration thread.
+++ b/qapi-schema.json
@@ -459,12 +459,14 @@
#
# @failed: some error occurred during migration process.
#
+# @colo: VM is in the process of fault tolerance. (since 2.8)
+#
The commit message mentions it, but the public documentation does not,
so it might be worth a followup patch that clarifies in the schema that
the 'colo' state is not possible without using the 'x-colo' migration
property (so that applications like libvirt know that they don't have to
worry about handling an unexpected state, at least not in 2.8 or until
the 'x-colo' is promoted to plain 'colo').