linux-kernel - Re: [PATCH 2/2] tracing: Add support for critical section events

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Message-ID: <20170905065230.lq5fsxgiv6ynehxp@hirez.programming.kicks-ass.net>
Date:   Tue, 5 Sep 2017 08:52:30 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Joel Fernandes <joelaf@...gle.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@...roid.com,
        Ingo Molnar <mingo@...hat.com>,
        Byungchul Park <byungchul.park@....com>,
        Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH 2/2] tracing: Add support for critical section events

On Mon, Sep 04, 2017 at 08:26:13PM -0700, Joel Fernandes wrote:

> Apologies, I meant (without the "off"):
> 
> subsystem: atomic_section
> events:
>   irqs_disable
>   irqs_enable
>   preempt_disable
>   preempt_enable
> 
> and additionally (similar to what my patch does):
>   preemptirq_enable
>   preemptirq_disable
> 

What do you need the last for?