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

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Message-ID: <20190321123715.027e9369@gandalf.local.home>
Date:   Thu, 21 Mar 2019 12:37:15 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Felipe Balbi <felipe.balbi@...ux.intel.com>
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

On Thu, 21 Mar 2019 11:38:56 +0200
Felipe Balbi <felipe.balbi@...ux.intel.com> wrote:

> Hi,
> 
> 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.

-- Steve