linux-kernel - Re: [PATCH] tracing/timerlat: Move hrtimer_init to timerlat

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Message-ID: <2024020140-santa-bagful-51d8@gregkh>
Date: Thu, 1 Feb 2024 10:12:50 -0800
From: Greg KH <gregkh@...uxfoundation.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Daniel Bristot de Oliveira <bristot@...nel.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] tracing/timerlat: Move hrtimer_init to timerlat_fd open()

On Thu, Feb 01, 2024 at 01:08:23PM -0500, Steven Rostedt wrote:
> On Thu, 1 Feb 2024 10:05:59 -0800
> Greg KH <gregkh@...uxfoundation.org> wrote:
> 
> > > timerlat_fd = open("/sys/kernel/tracing/osnoise/per_cpu/cpu0/timerlat_fd", 'r')
> > > timerlat_fd.close();
> > > 
> > > # ./taskset -c 0 ./timerlat_load.py
> > > <BOOM>  
> > 
> > Then obviously, this is a real, functional, change, so say so in the
> > kernel changelog :)
> 
> I've updated the change log to remove that comment and add the reproducer.

And cc: stable properly?  thanks!