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qcow2: Really use cache=unsafe for image creation

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For cache=unsafe we also need to set BDRV_O_CACHE_WB, otherwise we have some
strange unsafe writethrough mode.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This commit is contained in:
Kevin Wolf
2011-02-07 09:44:22 +01:00
parent ad36ce8ba9
commit e1a7107f2d
1 changed files with 2 additions and 1 deletions
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block/qcow2.c
+2 -1
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@@ -975,7 +975,8 @@ static int qcow2_create2(const char *filename, int64_t total_size,
*/
BlockDriver* drv = bdrv_find_format("qcow2");
assert(drv != NULL);
ret = bdrv_open(bs, filename, BDRV_O_RDWR | BDRV_O_NO_FLUSH, drv);
ret = bdrv_open(bs, filename,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH, drv);
if (ret < 0) {
goto out;
}