linux-kernel - Re: Linux 3.19-rc5

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Message-ID: <20150203111859.GA2511@gmail.com>
Date:	Tue, 3 Feb 2015 12:18:59 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Peter Hurley <peter@...leysoftware.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Bruno Prémont <bonbons@...ux-vserver.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ilya Dryomov <ilya.dryomov@...tank.com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: Linux 3.19-rc5


* Peter Zijlstra <peterz@...radead.org> wrote:

> On Thu, Jan 29, 2015 at 05:25:07PM -0800, Linus Torvalds wrote:
>
> > PeterZ, please don't make "debugging" patches like this. Ever 
> > again. Because this was just stupid, and it took me too long 
> > to realize that despite the warning being shut up, the debug 
> > patch was still actively doing bad bad things.
> 
> Understood.

It was my fault too - I should have realized this side effect of 
the new debugging facility when I merged it, which side effect, 
as Linus pointed it out, is a really bad idea.

We are generally pretty good at doing transparent debugging in 
the scheduler and in the locking code, but screwed up this time 
around :-(

Thanks,

	Ingo
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