Re: [Qemu-devel] Are "info pic" and "info irq" still of any use?

[Kevin Wolf]

Am 31.03.2015 um 11:56 hat Markus Armbruster geschrieben:
> These commands look like bit-rotted development aids to me.
> 
> They're limited to just a few interrupt controllers.  For the most
> common machine types and accelerators, they do nothing.
> 
> They complicate David Gibson's work on disentangling dependencies on
> ISA.
> 
> I'm cc'ing the maintainers of all machines that can be configured in a
> way that makes these commands do something.  Please speak up if you
> think they provide value.

I've used 'info pic' before (on i386) and I think it has helped me a bit
in debugging a guest. Definitely not mainstream usage, but there is some
value.

It's not specifically this feature, but in my experience TCG guests are
much friendlier for debugging (or I just don't know how to do it right
for KVM guests - which would mean that for TCG the features are more
discoverable and therefore friendlier again), so I actively avoid KVM
when doing that.

I would appreciate if the disparity would be solved by KVM guests
getting friendlier instead of TCG guests becoming harder to debug.

That said, if there are good replacements, there is nothing that should
stop us from removing old HMP commands when they are worse than newer
commands.

Kevin