diff options
author | Paolo Bonzini <pbonzini@redhat.com> | 2012-06-06 00:04:53 +0200 |
---|---|---|
committer | Kevin Wolf <kwolf@redhat.com> | 2012-06-15 14:03:43 +0200 |
commit | e1e9b0aca05747be9e2174a53205bd904c10da49 (patch) | |
tree | 7f802701f7ca30c40768aa974ec61f8df9af8bc1 /block.c | |
parent | 425b01487a8072c3b16fa4b3fca30d8ecd06e0ca (diff) | |
download | qemu-e1e9b0aca05747be9e2174a53205bd904c10da49.zip qemu-e1e9b0aca05747be9e2174a53205bd904c10da49.tar.gz qemu-e1e9b0aca05747be9e2174a53205bd904c10da49.tar.bz2 |
block: always open drivers in writeback mode
Formats are entirely in charge of flushes for metadata writes. For
guest-initiated writes, a writethrough cache is faked in the block layer.
So we can always open in writeback mode.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block.c')
-rw-r--r-- | block.c | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -649,12 +649,13 @@ static int bdrv_open_common(BlockDriverState *bs, const char *filename, bs->opaque = g_malloc0(drv->instance_size); bs->enable_write_cache = !!(flags & BDRV_O_CACHE_WB); + open_flags = flags | BDRV_O_CACHE_WB; /* * Clear flags that are internal to the block layer before opening the * image. */ - open_flags = flags & ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING); + open_flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING); /* * Snapshots should be writable. |