[Qemu-devel] [PATCH 14/17] add new RanState RAN_STATE_MEMORY_STALE

[Lei Li <lilei@linux.vnet.ibm.com>]

Introduce new RanState RAN_STATE_MEMORY_STALE and
add it to runstate_needs_reset().

Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
---
 qapi-schema.json |    7 +++++--
 vl.c             |   13 ++++++++++++-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/qapi-schema.json b/qapi-schema.json
index b290a0f..4d9e712 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -176,12 +176,15 @@
 # @watchdog: the watchdog action is configured to pause and has been triggered
 #
 # @guest-panicked: guest has been panicked as a result of guest OS panic
+#
+# @memory-stale: guest is paused to start unix_page_flipping migration
+# process, the destination QEMU will has the newer contents of the memory
 ##
 { 'enum': 'RunState',
   'data': [ 'debug', 'inmigrate', 'internal-error', 'io-error', 'paused',
             'postmigrate', 'prelaunch', 'finish-migrate', 'restore-vm',
-            'running', 'save-vm', 'shutdown', 'suspended', 'watchdog',
-            'guest-panicked' ] }
+            'running', 'save-vm', 'shutdown', 'suspended', 'memory-stale',
+            'watchdog', 'guest-panicked' ] }
 
 ##
 # @SnapshotInfo
diff --git a/vl.c b/vl.c
index 8d5d874..3ea96b2 100644
--- a/vl.c
+++ b/vl.c
@@ -601,6 +601,7 @@ static const RunStateTransition runstate_transitions_def[] = {
 
     { RUN_STATE_PAUSED, RUN_STATE_RUNNING },
     { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_PAUSED, RUN_STATE_MEMORY_STALE },
 
     { RUN_STATE_POSTMIGRATE, RUN_STATE_RUNNING },
     { RUN_STATE_POSTMIGRATE, RUN_STATE_FINISH_MIGRATE },
@@ -608,6 +609,7 @@ static const RunStateTransition runstate_transitions_def[] = {
     { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING },
     { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE },
     { RUN_STATE_PRELAUNCH, RUN_STATE_INMIGRATE },
+    { RUN_STATE_PRELAUNCH, RUN_STATE_MEMORY_STALE },
 
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING },
     { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE },
@@ -624,23 +626,31 @@ static const RunStateTransition runstate_transitions_def[] = {
     { RUN_STATE_RUNNING, RUN_STATE_SHUTDOWN },
     { RUN_STATE_RUNNING, RUN_STATE_WATCHDOG },
     { RUN_STATE_RUNNING, RUN_STATE_GUEST_PANICKED },
+    { RUN_STATE_RUNNING, RUN_STATE_MEMORY_STALE },
 
     { RUN_STATE_SAVE_VM, RUN_STATE_RUNNING },
 
     { RUN_STATE_SHUTDOWN, RUN_STATE_PAUSED },
     { RUN_STATE_SHUTDOWN, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_SHUTDOWN, RUN_STATE_MEMORY_STALE },
 
     { RUN_STATE_DEBUG, RUN_STATE_SUSPENDED },
+    { RUN_STATE_DEBUG, RUN_STATE_MEMORY_STALE },
     { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED },
     { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING },
     { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_SUSPENDED, RUN_STATE_MEMORY_STALE },
 
     { RUN_STATE_WATCHDOG, RUN_STATE_RUNNING },
     { RUN_STATE_WATCHDOG, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_WATCHDOG, RUN_STATE_MEMORY_STALE },
 
     { RUN_STATE_GUEST_PANICKED, RUN_STATE_RUNNING },
     { RUN_STATE_GUEST_PANICKED, RUN_STATE_FINISH_MIGRATE },
+    { RUN_STATE_GUEST_PANICKED, RUN_STATE_MEMORY_STALE },
 
+    { RUN_STATE_MEMORY_STALE, RUN_STATE_RUNNING },
+    { RUN_STATE_MEMORY_STALE, RUN_STATE_POSTMIGRATE },
     { RUN_STATE_MAX, RUN_STATE_MAX },
 };
 
@@ -685,7 +695,8 @@ int runstate_is_running(void)
 bool runstate_needs_reset(void)
 {
     return runstate_check(RUN_STATE_INTERNAL_ERROR) ||
-        runstate_check(RUN_STATE_SHUTDOWN);
+        runstate_check(RUN_STATE_SHUTDOWN) ||
+        runstate_check(RUN_STATE_MEMORY_STALE);
 }
 
 StatusInfo *qmp_query_status(Error **errp)
-- 
1.7.7.6