linux-kernel - Re: [PATCH V2 00/13] perf/x86: Add perf text poke events

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Date:   Mon, 24 Feb 2020 15:03:57 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 00/13] perf/x86: Add perf text poke events

On Mon, Feb 24, 2020 at 03:50:13PM +0200, Adrian Hunter wrote:
> On 12/02/20 2:49 pm, Adrian Hunter wrote:
> > Hi
> > 
> > Here are patches to add a text poke event to record changes to kernel text
> > (i.e. self-modifying code) in order to support tracers like Intel PT
> > decoding through jump labels, kprobes and ftrace trampolines.
> > 
> > The first 8 patches make the kernel changes and the subsequent patches are
> > tools changes.
> > 
> > The next 4 patches add support for updating perf tools' data cache
> > with the changed bytes.
> > 
> > The last patch is an Intel PT specific tools change.
> > 
> > 
> > Changes in V2:
> > 
> >   perf: Add perf text poke event
> > 
> > 	Separate out x86 changes
> > 	The text poke event now has old len and new len
> > 	Revised commit message
> > 
> >   perf/x86: Add support for perf text poke event for text_poke_bp_batch() callers
> > 
> > 	New patch containing x86 changes from original first patch
> 
> Any comments?
> 

hi,
I plan to look on it hopefuly today or tomorrow

jirka