linux-kernel - Re: Crashes with 874bbfe600a6 in 3.18.25

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Message-ID: <20160209182757.GD3741@mtj.duckdns.org>
Date:	Tue, 9 Feb 2016 13:27:57 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Mike Galbraith <umgwanakikbuti@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Michal Hocko <mhocko@...nel.org>, Jiri Slaby <jslaby@...e.cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	Petr Mladek <pmladek@...e.com>, Jan Kara <jack@...e.cz>,
	Ben Hutchings <ben@...adent.org.uk>,
	Sasha Levin <sasha.levin@...cle.com>, Shaohua Li <shli@...com>,
	LKML <linux-kernel@...r.kernel.org>,
	stable <stable@...r.kernel.org>,
	Daniel Bilik <daniel.bilik@...system.cz>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Crashes with 874bbfe600a6 in 3.18.25

Hello, Mike.

On Tue, Feb 09, 2016 at 07:02:35PM +0100, Mike Galbraith wrote:
> > It doesn't do anything unless the user twiddles the mask to exclude
> > certain (think no_hz_full) CPUs, so there are no clueless victims.
> 
> (a plus: testers/robots can twiddle mask to help find bugs, _and_
> nohz_full people can use it if they so choose)

Ah, yeah, it makes sense then.  I'm gonna play with a bit and add a
debug option to always force the behavior.

Thanks.

-- 
tejun