linux-kernel - Re: [PATCH 0/4] v6 Improve task->comm locking situation

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Message-ID: <20110518204805.GA11427@elte.hu>
Date:	Wed, 18 May 2011 22:48:05 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	John Stultz <john.stultz@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Joe Perches <joe@...ches.com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Andy Whitcroft <apw@...onical.com>,
	Jiri Slaby <jirislaby@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>,
	Dave Hansen <dave@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 0/4] v6 Improve task->comm locking situation


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Wed, 18 May 2011 21:48:11 +0200
> Ingo Molnar <mingo@...e.hu> wrote:
> 
> > Dunno, %ptc ties into lowlevel sprintf() and takes a spinlock!
> 
> yup, that's a problem.

If the lock is removed it looks useful.

> > Oh, out of morbid curiosity, mind providing a log of bigger past incidents 
> > where you had to stick pins into a doll of me? (In private mail, if the list is 
> > too long ;-)
> 
> http://0.tqn.com/d/urbanlegends/1/0/m/B/porcupine2.jpg

That looks manageable! I was hoping not to end up like this:

  http://i.telegraph.co.uk/multimedia/archive/00675/china_needle404_675809c.jpg

Thanks,

	Ingo
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