commit a659979328fb6d4d6100d398f5bd9a2310c3e169
author Christoph Hellwig <hch@lst.de> Tue May 17 18:04:06 2011 +0200
committer Kevin Wolf <kwolf@redhat.com> Wed Jun 08 10:39:32 2011 +0200
tree 8d465d20ea1efc82134941d9a589c4b224ce4b3b
parent 69c38b8fcec823da05f98f6ea98ec2b0013d64e2

block: clarify the meaning of BDRV_O_NOCACHE

Change BDRV_O_NOCACHE to only imply bypassing the host OS file cache,
but no writeback semantics.  All existing callers are changed to also
specify BDRV_O_CACHE_WB to give them writeback semantics.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

blockdev.c

diff --git a/blockdev.c b/blockdev.c
index 6e0eb83..1502575 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -326,7 +326,7 @@
 
     if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
         if (!strcmp(buf, "off") || !strcmp(buf, "none")) {
-            bdrv_flags |= BDRV_O_NOCACHE;
+            bdrv_flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
         } else if (!strcmp(buf, "writeback")) {
             bdrv_flags |= BDRV_O_CACHE_WB;
         } else if (!strcmp(buf, "unsafe")) {