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Re: [Qemu-devel] [PATCH v2] trace: [qmp] Add QAPI/QMP commands to query
From: |
Markus Armbruster |
Subject: |
Re: [Qemu-devel] [PATCH v2] trace: [qmp] Add QAPI/QMP commands to query and control event tracing state |
Date: |
Wed, 20 Aug 2014 21:02:07 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Lluís Vilanova <address@hidden> writes:
> Markus Armbruster writes:
>
>> Lluís Vilanova <address@hidden> writes:
>>> Also removes old "trace-event", "trace-file" and "info trace-events" HMP
>>> commands.
>
>> We gain the ability to control trace via QMP, but lose the ability to
>> control it via HMP, correct?
>
> Right. I can keep the HMP commands, but doing so requires exposing the
> internal
> trace event identifier number in the QMP interface. Also, "trace-file" cannot
> be
> implemented on top of the current QMP commands, and is specific to the
> "simple"
> tracing backend.
Would rough feature-parity with QMP be feasible with new HMP commands on
top of the QMP interfaces, completely ignoring HMP backward
compatibility?
[...]