linux-kernel - Re: [tip:perf/urgent] perf/core: Fix lock inversion between perf,trace,cpuhp

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Message-ID: <20180124124242.5037d0ac@vmware.local.home>
Date:   Wed, 24 Jan 2018 12:42:42 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Peter Anvin <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/urgent] perf/core: Fix lock inversion between
 perf,trace,cpuhp

On Wed, 24 Jan 2018 08:57:10 -0800
Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> Maybe git should have used a different comment scheme, but I have to
> admit that I think this is the first time I've heard of this issue
> causing problems in practice. I'm sure it's triggered before, and
> nobody has noticed (or I wasn't on the cc).

It does happen a bit in practice. It's nailed me a few times. I just
consider it as the way git works and didn't complain.
 
> 
> So the '#' thing _normally_ works, but yes, it can cause issues.

I just brought this up here:

 http://lkml.kernel.org/r/20180112121148.20778932@gandalf.local.home

And someone replied with a pointer to:

 https://github.com/git/git/blob/master/Documentation/RelNotes/2.0.0.txt

suggesting 

   git config commit.cleanup scissors

Where git looks for:

 # ------------------------ >8 ------------------------

and does not delete comments before it. But this could play havoc when
doing squash though.

-- Steve