From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Mon, 30 Nov 2009 17:21:22 +0000 (+0100)
Subject: block migration: Increase dirty chunk size to 1M
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=23bd90d2f916f5a2e0a6ad00d26f3ff26144066d;p=qmiga%2Fqemu.git

block migration: Increase dirty chunk size to 1M

4K is too small for efficiently saving and restoring multi-GB block
devices.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---

diff --git a/block.h b/block.h
index 3513712277..4a8b6283e4 100644
--- a/block.h
+++ b/block.h
@@ -192,7 +192,7 @@ int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf,
 int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
                       int64_t pos, int size);
 
-#define BDRV_SECTORS_PER_DIRTY_CHUNK 8
+#define BDRV_SECTORS_PER_DIRTY_CHUNK 2048
 
 void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);
 int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);