Re: [Qemu-devel] [PATCH v5] block:add-cow file format

[Marcelo Tosatti]

On Tue, Dec 06, 2011 at 02:35:03PM -0200, Marcelo Tosatti wrote:
> > Right, we can probably generalise the qcow2 code and make it available
> > for other drivers as well.
> 
> Hum, generalising sounds overly complicated (and there is a time
> constraint to this). IMHO a cache internal to add-cow.c just to avoid
> reading the entire bitmap would do the trick. 

(and writes must go through the cache too, of course).