linux-kernel - Re: [GIT PULL] Scheduler updates for v6.17

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Message-ID: <CAHk-=wi26+UnKf59XjPbGssqS+quapnED1QGNW1mVDtEiuakdQ@mail.gmail.com>
Date: Sun, 3 Aug 2025 12:10:56 -0700
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org, 
	Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, 
	Juri Lelli <juri.lelli@...hat.com>, Vincent Guittot <vincent.guittot@...aro.org>, 
	Dietmar Eggemann <dietmar.eggemann@....com>, Mel Gorman <mgorman@...e.de>, Tejun Heo <tj@...nel.org>, 
	Valentin Schneider <vschneid@...hat.com>, Shrikanth Hegde <sshegde@...ux.ibm.com>
Subject: Re: [GIT PULL] Scheduler updates for v6.17

On Sat, 2 Aug 2025 at 12:46, Steven Rostedt <rostedt@...dmis.org> wrote:
>
> You could try to enable function tracer and stop the trace with the patch
> below and see where it happened.
>
>  # echo function > /sys/kernel/tracing/current_tracer
>  # echo 1 > /sys/kernel/tracing/tracing_on
>
> After it happens you can take a look at:
>
>   # cat /sys/kernel/tracing/trace

Note that when this happens, the machine is dead.

It seems to be alive enough to get this logged, but it's dead from a
functional standpoint. There's no "when it happens, do this".

                Linus