[Qemu-devel] Re: [PATCH 1/4] block: clarify the meaning of BDRV_O_NOCACHE

[Christoph Hellwig]

On Wed, Mar 16, 2011 at 09:42:37AM +0000, Stefan Hajnoczi wrote:
> -    writethrough = ((flags & BDRV_O_CACHE_MASK) == 0);
> +    writethrough = ((flags & (BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH)) == 0);

or rather

        writethrough = ((flags & (BDRV_O_CACHE_WB) != );

but yes, this code had sneaked in since my initial version.