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Re: [PATCH] trace/simple: Enable tracing on startup only if the user spe

From: Markus Armbruster
Subject: Re: [PATCH] trace/simple: Enable tracing on startup only if the user specifies a trace option
Date: Tue, 20 Oct 2020 11:19:52 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux)

Markus Armbruster <armbru@redhat.com> writes:

> Stefan Hajnoczi <stefanha@gmail.com> writes:
>> On Sun, Aug 16, 2020 at 12:46:10PM -0500, duboisj@gmail.com wrote:
>>> From: Josh DuBois <josh@joshdubois.com>
>>> Tracing can be enabled at the command line or via the
>>> monitor. Command-line trace options are recorded during
>>> trace_opt_parse(), but tracing is not enabled until the various
>>> front-ends later call trace_init_file(). If the user passes a trace
>>> option on the command-line, remember that and enable tracing during
>>> trace_init_file().  Otherwise, trace_init_file() should record the
>>> trace file specified by the frontend and avoid enabling traces
>>> until the user requests them via the monitor.
>>> This fixes 1b7157be3a8c4300fc8044d40f4b2e64a152a1b4 and also
>>> db25d56c014aa1a96319c663e0a60346a223b31e, by allowing the user
>>> to enable traces on the command line and also avoiding
>>> unwanted trace-<pid> files when the user has not asked for them.
>>> Fixes: 1b7157be3a8c4300fc8044d40f4b2e64a152a1b4
>>> Signed-off-by: Josh DuBois <josh@joshdubois.com>
>>> ---
>>>  trace/control.c | 6 +++++-
>>>  1 file changed, 5 insertions(+), 1 deletion(-)
>> Thanks, applied to my tracing-next tree:
>> https://github.com/stefanha/qemu/commits/tracing-next
>> Stefan
> Pull request?


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