Re: [Qemu-devel] Closing Bitmaps (Was: Re: [PATCH v7 03/24] block: Release dirty bitmaps in bdrv_close())

[Kevin Wolf]

Am 17.11.2015 um 18:05 hat John Snow geschrieben:
> Still the subject of debate on-list, but the thought is roughly this:
> 
> Bitmaps will be able to flush-to-file on close. (If they have no
> persistence data, it's a no-op (maybe.)) This might mean being flushed
> to their own BDS -- the one they are describing -- as a qcow2 extension.
> Or, it could be to an arbitrary new standalone file format designed for
> the sole purpose of containing bitmap data.
> 
> The discussion hasn't progressed beyond "Max and Kevin do not think
> storing arbitrary bitmaps in .qcow2 files is a good idea." The logical
> conclusion is "We need a new standalone format, then" but we haven't
> decided what that format will look like or how it will be used.

I think the actual logical conclusion is that you use qcow2 images in
order to use the feature.

Kevin