Re: [Qemu-devel] [PATCH] scripts: Add qom-tree script as modern equivalent of info qtree

[Andreas Färber]

Am 05.02.2014 18:55, schrieb Paolo Bonzini:
> Il 05/02/2014 18:51, Andreas Färber ha scritto:
>>> > So, even though I think this script is a very welcome addition, I
>>> don't
>>> > think it helps settling the question of what to do with "info qtree".
>>> > IMO there's no good reason to exclude busless devices from "info
>>> qtree",
>>> > and it's a bug (of course less severe than crashing, but still a bug)
>>> > that the busless nand device doesn't appear there.
>> Don't you see that that is unfixable? We may be able to replace info
>> qtree by an info qom-tree, which does the equivalent of this QMP-based
>> script, but qtree ues a completely different display hierarchy than QOM.
> 
> Yes, that's why it's useful. :)
> 
> Busless devices can still be listed, either under their parent or as
> siblings of the system bus.

info qtree has been inconclusive for - what? - two years now and no one
has bothered to fix it. If you or Markus care about it, post a patch. :)

The code uses qdev/qbus functions to list those devices so I don't see
an easy way of filtering those devices that qdev/qbus missed and
printing them using the same walking functions. Therefore my saying that
we would need to walk the QOM hierarchy instead, which is
output-incompatible with info qtree and thus a different command.

Not to mention that it will not work for objects that are not devices.

Andreas

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