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block: clarify the meaning of BDRV_O_NOCACHE

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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>
This commit is contained in:
Christoph Hellwig 2011-05-17 18:04:06 +02:00 • committed by Kevin Wolf
parent 69c38b8fce
commit a659979328
7 changed files with 13 additions and 19 deletions
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4
qemu-io.c
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@ -1655,7 +1655,7 @@ open_f(int argc, char **argv)
flags |= BDRV_O_SNAPSHOT;
break;
case 'n':
flags |= BDRV_O_NOCACHE;
flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
break;
case 'r':
readonly = 1;
@ -1751,7 +1751,7 @@ int main(int argc, char **argv)
flags |= BDRV_O_SNAPSHOT;
break;
case 'n':
flags |= BDRV_O_NOCACHE;
flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
break;
case 'c':
add_user_command(optarg);