Re: [Qemu-devel] [SeaBIOS] [PATCH] don't expose pvpanic device in the UI

[Michael S. Tsirkin]

On Tue, Aug 06, 2013 at 10:21:52AM +0300, Gleb Natapov wrote:
> > If you see a mouse in a room, how likely is it that there's
> > a single mouse there?
> > 
> > This is a PV technology which to me looks like it was
> > rushed through and not only set on by default, but
> > without a way to disable it - apparently on the assumption
> > there's 0 chance it can cause any damage. Now that
> > we do know the chance it's not there, why not go back
> > to the standard interface, and why not give
> > users a chance to enable/disable it?
> You should be able to disable it with: -device pvpanic,ioport=0

Doesn't work for me.
Besides, both -device pvpanic and use of ioport=0 to disable it
are completely undocumented.

BTW pls keep qemu-devel Cc'd.

> We have different definition of "damage" though.

Driver bugs, qemu bugs, OSPM bugs all can cause issues
like OS crashes, suspend/resume issues, bad
performance ... What's your definition of damage?

-- 
MST