linux-kernel - Re: perf/jit doesn't cope well with mprotect() to jit containing pages

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Date:   Fri, 27 Jan 2017 12:43:05 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Stephane Eranian <eranian@...gle.com>,
        Andres Freund <andres@...razel.de>,
        "eranian@...il.com" <eranian@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...e.hu>,
        Anton Blanchard <anton@...abs.org>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: perf/jit doesn't cope well with mprotect() to jit containing
 pages

Em Fri, Jan 27, 2017 at 02:07:02PM +0100, Peter Zijlstra escreveu:
> Something like the (compile tested only) below might be sufficient to
> disambiguate things. It would need a corresponding tools/perf patch of
> course, but I'm not too familiar with that code anymore.

I'm working on patch to do feature test, fallback and handling of the
event, etc, will post later.

- Arnaldo