From e1e9b0aca05747be9e2174a53205bd904c10da49 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 6 Jun 2012 00:04:53 +0200 Subject: 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 Signed-off-by: Kevin Wolf --- block.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'block.c') diff --git a/block.c b/block.c index e4396a6c46..48528fd431 100644 --- a/block.c +++ b/block.c @@ -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. -- cgit v1.2.1