Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again

[Christoph Hellwig]

On Mon, Jun 22, 2009 at 01:18:03PM +0200, Kevin Wolf wrote:
> Since the patch that suggested it woudl revert qcow2 to writeback caching, in
> fact none of the drivers has had cache=off as default any more. This patch
> restores the desired behaviour.

Looks good to me.  I still quite hate that BDRV_O_CACHE_DEF thing, just
makes it too complicated for drivers to get it right.

Btw, what is the performance for qcow2 without write-back caching with
all your improvements?