linux-kernel - Re: [PATCH] usb: gadget: functions: add ftrace export over USB

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Message-ID: <87va0bdt7g.fsf@linux.intel.com>
Date:   Fri, 22 Mar 2019 13:49:55 +0200
From:   Felipe Balbi <felipe.balbi@...ux.intel.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        Linux USB <linux-usb@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        Chunyan Zhang <zhang.chunyan@...aro.org>
Subject: Re: [PATCH] usb: gadget: functions: add ftrace export over USB


Hi,

Steven Rostedt <rostedt@...dmis.org> writes:
>> Felipe Balbi <felipe.balbi@...ux.intel.com> writes:
>> > Allow for ftrace data to be exported over a USB Gadget
>> > Controller. With this, we have a potentially very fast pipe for
>> > transmitting ftrace data to a Host PC for further analysis.
>> >
>> > Note that in order to decode the data, one needs access to kernel
>> > symbols in order to convert binary data into function names and what
>> > not.
>> >
>> > Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
>> > ---
>> >
>> > I wanted to take this through the gadget tree, but there is a
>> > dependency with a previous patch of mine adding and extra argument to
>> > the ->write() function. Hoping someone else will take it.  
>> 
>> This is still not upstream, I'll take it through my tree this time around.
>> 
>
> Can you post the latest to the list one more time. At least to make
> sure you got the naming correct ;-)
>
>   Not FTrace or f_trace.

The reason for the name was discussed already. See [1] and [2]

[1] https://marc.info/?i=878tl1qmrj.fsf@linux.intel.com
[2] https://marc.info/?i=20170609110717.3304f6b9@gandalf.local.home

-- 
balbi

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