[Qemu-devel] [7002] stop dirty tracking just at the end of migration (Glauber Costa)

[Anthony Liguori <anthony@codemonkey.ws>]

Revision: 7002
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=7002
Author:   aliguori
Date:     2009-04-05 19:33:41 +0000 (Sun, 05 Apr 2009)
Log Message:
-----------
stop dirty tracking just at the end of migration (Glauber Costa)

If there is still work to do, it is not safe to assume we
can end the dirty tracking. Specifically, kvm can update the dirty
tracking log inside ram_save_block(), leaving pages still out of sync
if we go with the current code.

Based on a patch by Yaniv Kamay

Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

Modified Paths:
--------------
    branches/stable_0_10/vl.c

Modified: branches/stable_0_10/vl.c
===================================================================
--- branches/stable_0_10/vl.c	2009-04-05 19:33:37 UTC (rev 7001)
+++ branches/stable_0_10/vl.c	2009-04-05 19:33:41 UTC (rev 7002)
@@ -3220,10 +3220,10 @@
     /* try transferring iterative blocks of memory */
 
     if (stage == 3) {
-        cpu_physical_memory_set_dirty_tracking(0);
 
         /* flush all remaining blocks regardless of rate limiting */
         while (ram_save_block(f) != 0);
+        cpu_physical_memory_set_dirty_tracking(0);
     }
 
     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);