linux-kernel - Re: Interface for enabling context tracking

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Message-ID: <d749ab33-706f-4cc3-8124-fc71e6f8fedd@cs.wisc.edu>
Date: Thu, 10 Apr 2025 15:31:12 -0500
From: Junxuan Liao <ljx@...wisc.edu>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Frederic Weisbecker <frederic@...nel.org>,
        "Paul E. McKenney" <paulmck@...nel.org>, linux-kernel@...r.kernel.org,
        linux-trace-kernel@...r.kernel.org,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: Re: Interface for enabling context tracking

On 4/10/25 2:05 PM, Steven Rostedt wrote:

> I think the best thing to do is to add trace events in all areas that enter
> and exit the kernel normally (where noinstr is turned off). There's already
> one for page faults on entry. It's been on my todo list to add one for page
> fault exit (as I do care for how long they last.

I agree. That's indeed better.

> I believe the irq vectors also have entry and exits trace events.
> 
> What else is missing?

That's everything as far as I know.

Thanks,
Junxuan