From 50717e941b9f306a45292621999eeafbaa954418 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 21 Jan 2013 17:09:45 +0100
Subject: block: allow customizing the granularity of the dirty bitmap

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block-migration.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'block-migration.c')

diff --git a/block-migration.c b/block-migration.c
index 9d0b037029..9ac7de6d78 100644
--- a/block-migration.c
+++ b/block-migration.c
@@ -23,7 +23,8 @@
 #include "sysemu/blockdev.h"
 #include <assert.h>
 
-#define BLOCK_SIZE (BDRV_SECTORS_PER_DIRTY_CHUNK << BDRV_SECTOR_BITS)
+#define BLOCK_SIZE                       (1 << 20)
+#define BDRV_SECTORS_PER_DIRTY_CHUNK     (BLOCK_SIZE >> BDRV_SECTOR_BITS)
 
 #define BLK_MIG_FLAG_DEVICE_BLOCK       0x01
 #define BLK_MIG_FLAG_EOS                0x02
@@ -254,7 +255,7 @@ static void set_dirty_tracking(int enable)
     BlkMigDevState *bmds;
 
     QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) {
-        bdrv_set_dirty_tracking(bmds->bs, enable);
+        bdrv_set_dirty_tracking(bmds->bs, enable ? BLOCK_SIZE : 0);
     }
 }
 
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