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Tue, 20 Oct 2020 11:19:52 +0200 (CEST) From: Markus Armbruster To: Stefan Hajnoczi Subject: Re: [PATCH] trace/simple: Enable tracing on startup only if the user specifies a trace option References: <20200816174610.20253-1-josh@joshdubois.com> <20200911100805.GB81586@stefanha-x1.localdomain> <87lfgt3u0i.fsf@dusky.pond.sub.org> Date: Tue, 20 Oct 2020 11:19:52 +0200 In-Reply-To: <87lfgt3u0i.fsf@dusky.pond.sub.org> (Markus Armbruster's message of "Tue, 29 Sep 2020 09:46:21 +0200") Message-ID: <87blgxfe4n.fsf@dusky.pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=armbru@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain Received-SPF: pass client-ip=63.128.21.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/20 01:15:43 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-trivial@nongnu.org, duboisj@gmail.com, qemu-devel@nongnu.org, Josh DuBois Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Markus Armbruster writes: > Stefan Hajnoczi writes: > >> On Sun, Aug 16, 2020 at 12:46:10PM -0500, duboisj@gmail.com wrote: >>> From: Josh DuBois >>> >>> 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- files when the user has not asked for them. >>> >>> Fixes: 1b7157be3a8c4300fc8044d40f4b2e64a152a1b4 >>> Signed-off-by: Josh DuBois >>> --- >>> 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? Pretty-please?