[Qemu-devel] [PATCH 15/17] migration-unix: page flipping support on unix outgoing

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

Add page flipping support on unix outgoing part by stopping
VM with the new RunState RUN_STATE_MEMORY_STALE before
invoking migration if unix_page_flipping enabled.

Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
---
 migration-unix.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/migration-unix.c b/migration-unix.c
index 9beeafe..cbf2087 100644
--- a/migration-unix.c
+++ b/migration-unix.c
@@ -19,6 +19,7 @@
 #include "migration/migration.h"
 #include "migration/qemu-file.h"
 #include "block/block.h"
+#include "sysemu/sysemu.h"
 
 //#define DEBUG_MIGRATION_UNIX
 
@@ -33,6 +34,7 @@
 static void unix_wait_for_connect(int fd, void *opaque)
 {
     MigrationState *s = opaque;
+    int ret;
 
     if (fd < 0) {
         DPRINTF("migrate connect error\n");
@@ -47,6 +49,15 @@ static void unix_wait_for_connect(int fd, void *opaque)
             goto fail;
         }
 
+        /* Stop VM before invoking migration if unix_page_flipping enabled */
+        if (migrate_unix_page_flipping()) {
+            ret = vm_stop_force_state(RUN_STATE_MEMORY_STALE);
+            if (ret < 0) {
+                DPRINTF("failed to stop VM\n");
+                goto fail;
+            }
+        }
+
         migrate_fd_connect(s);
         return;
     }
-- 
1.7.7.6