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[Qemu-devel] [PATCH v2 1/3] migration: notify migration state before sta

From: Stefan Hajnoczi
Subject: [Qemu-devel] [PATCH v2 1/3] migration: notify migration state before starting thread
Date: Tue, 23 Jul 2013 15:26:42 +0200

The migration thread runs outside the QEMU global mutex when possible.
Therefore we must notify migration state change *before* starting the
migration thread.

This allows registered listeners to act before live migration iterations
begin.  Therefore they can get into a state that allows for live
migration.  When the migration thread starts everything will be ready.

Acked-by: Paolo Bonzini <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
 migration.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/migration.c b/migration.c
index a9c0421..b7f1728 100644
--- a/migration.c
+++ b/migration.c
@@ -634,7 +634,9 @@ void migrate_fd_connect(MigrationState *s)
                              s->bandwidth_limit / XFER_LIMIT_RATIO);
+    /* Notify before starting migration thread */
+    notifier_list_notify(&migration_state_notifiers, s);
     qemu_thread_create(&s->thread, migration_thread, s,
-    notifier_list_notify(&migration_state_notifiers, s);

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