linux-kernel - Re: [PATCH V7 00/15] perf/x86: Add perf text poke events

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Message-ID: <bee04840-143c-18bb-df82-5aa58d70730e@intel.com>
Date:   Sun, 17 May 2020 16:16:50 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        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>, Jiri Olsa <jolsa@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V7 00/15] perf/x86: Add perf text poke events

On 12/05/20 3:19 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 next patch is an Intel PT specific tools change.
> 
> The final 2 patches add perf script --show-text-poke-events option
> 
> Patches also here:
> 
> 	git://git.infradead.org/users/ahunter/linux-perf.git text_poke
> 
> Changes in V7
> 
>   perf: Add perf text poke event
>   perf/x86: Add support for perf text poke event for text_poke_bp_batch() callers
>   kprobes: Add symbols for kprobe insn pages
>   kprobes: Add perf ksymbol events for kprobe insn pages
>   perf/x86: Add perf text poke events for kprobes
>   ftrace: Add symbols for ftrace trampolines
>   ftrace: Add perf ksymbol events for ftrace trampolines
>   ftrace: Add perf text poke events for ftrace trampolines
> 
> 	Added Peter's Ack
> 	Improved commit message for text_poke events for ftrace trampolines
> 
>   perf kcore_copy: Fix module map when there are no modules loaded
>   perf evlist: Disable 'immediate' events last
>   perf tools: Add support for PERF_RECORD_TEXT_POKE
>   perf tools: Add support for PERF_RECORD_KSYMBOL_TYPE_OOL
>   perf intel-pt: Add support for text poke events
>   perf script: Add option --show-text-poke-events
>   perf script: Show text poke address symbol
> 
> 	Re-based on Arnaldo's perf/core branch
> 

Arnaldo, any comments on the tools patches?