[Qemu-devel] [6999] stop dirty tracking just at the end of migration (Glauber Costa)

[Anthony Liguori]

Revision: 6999
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6999
Author:   aliguori
Date:     2009-04-05 19:30:55 +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 <address@hidden>
Signed-off-by: Anthony Liguori <address@hidden>

Modified Paths:
--------------
    trunk/vl.c

Modified: trunk/vl.c
===================================================================
--- trunk/vl.c  2009-04-05 19:30:51 UTC (rev 6998)
+++ trunk/vl.c  2009-04-05 19:30:55 UTC (rev 6999)
@@ -3252,10 +3252,10 @@
     /* 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);