Re: [PATCH v2] docs: expand firmware descriptor to allow flash without NVRAM

[Gerd Hoffmann]

On Mon, Jan 31, 2022 at 04:21:36PM +0100, Kashyap Chamarthy wrote:
> On Mon, Jan 31, 2022 at 02:36:46PM +0000, Daniel P. Berrangé wrote:
> > On Mon, Jan 31, 2022 at 03:00:33PM +0100, Kashyap Chamarthy wrote:
> > > On Mon, Jan 31, 2022 at 12:55:09PM +0000, Daniel P. Berrangé wrote:
> 
> [...]
> 
> > > I briefly wondered if in this "combined" mode whether the no. of
> > > duplicate copies can ever fill up the storage.  I doubt that, as the
> > > combined size of _VARS + _CODE is just about 2MB.  So it only starts
> > > mattering if you're running tens of thousands of guests.
> > 
> > When guest root / data disk sizes are measured in 100's of MB, or
> > GBs, I struggle to get worried about even a 16 MB OVMF  blob being
> > copied per guest.
> 
> Heh, fair enough.

Main advantage of the split is that it is much easier to update the
firmware code without smashing the guest vars, not so much the disk
space requirements.

take care,
  Gerd