linux-kernel - Re: [PATCH v2 0/2] Introduce the pkill_on

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Message-ID: <20211122112106.5fa656bc@gandalf.local.home>
Date:   Mon, 22 Nov 2021 11:21:06 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Marco Elver <elver@...gle.com>
Cc:     Kees Cook <keescook@...omium.org>,
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Subject: Re: [PATCH v2 0/2] Introduce the pkill_on_warn parameter

On Sat, 20 Nov 2021 13:17:08 +0100
Marco Elver <elver@...gle.com> wrote:


> I think userspace would want something other than perf tool to handle it
> of course.  There are several options:
> 
> 	1. Open trace pipe to be notified (/sys/kernel/tracing/trace_pipe).
> 	   This already includes the pid.

I would suggest using /sys/kernel/tracing/per_cpu/cpu*/trace_pipe_raw

and use libtracefs[1] to read it.

-- Steve

[1] https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/