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-rw-r--r--blockdev.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/blockdev.c b/blockdev.c
index eecd78d276..1824cae259 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -675,6 +675,13 @@ static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
goto fail;
}
+ /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
+ * with other callers) rather than what we want as the real defaults.
+ * Apply the defaults here instead. */
+ qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_WB, "on");
+ qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
+ qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
+
if (runstate_check(RUN_STATE_INMIGRATE)) {
bdrv_flags |= BDRV_O_INACTIVE;
}