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From: Christoph Lameter <clameter@sgi.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Arjan van de Ven <arjan@infradead.org>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	LKML <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Bart Van Assche <bart.vanassche@gmail.com>
Subject: Re: quicklists confuse meminfo
Date: Mon, 10 Mar 2008 08:55:41 -0700 (PDT)	[thread overview]
Message-ID: <Pine.LNX.4.64.0803100855110.23575@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20080309192514.GA16759@elte.hu>

On Sun, 9 Mar 2008, Ingo Molnar wrote:

> > careful with this; the quicklists aren't JUST for speed they are also 
> > there to make sure a page we free that is a pagetable, is not reused 
> > until we have finished flushing the tlbs on all the cpus that saw it. 
> > This is a really hard correctness requirement, and while I can see 
> > that quicklists are probably not the best way to achieve this, we 
> > can't just throw away the behavior ;(
> 
> no, that's not true anymore - and the current quicklists code doesnt do 
> anything like that AFAICS. It used to be a lot more complex, but now 
> it's just a thin wrapper around the page allocator.

Sure it does that. It interacts with the TLB logic which is another bad 
thing as Linus has pointed out.



  parent reply	other threads:[~2008-03-10 15:56 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-09 10:19 Thomas Gleixner
2008-03-09 10:26 ` Bart Van Assche
2008-03-09 10:29 ` Andi Kleen
2008-03-09 10:42 ` KOSAKI Motohiro
2008-03-09 12:00   ` Thomas Gleixner
2008-03-09 11:14 ` Ingo Molnar
2008-03-09 11:56   ` Thomas Gleixner
2008-03-09 12:01     ` Ingo Molnar
2008-03-09 12:49       ` Andi Kleen
2008-03-10 15:51         ` Christoph Lameter
2008-03-09 12:03   ` Johannes Weiner
2008-03-09 12:03   ` KOSAKI Motohiro
2008-03-09 12:09     ` Ingo Molnar
2008-03-09 12:34       ` Ingo Molnar
2008-03-09 12:51         ` KOSAKI Motohiro
2008-03-09 13:20         ` Thomas Gleixner
2008-03-09 18:46         ` Andrew Morton
2008-03-09 20:21           ` Andi Kleen
2008-03-10 15:54           ` Christoph Lameter
2008-03-10 16:43             ` Andi Kleen
2008-03-10 17:19               ` Hugh Dickins
2008-03-10 17:25                 ` Andi Kleen
2008-03-10 17:31                 ` Jeremy Fitzhardinge
2008-03-10 17:53                   ` Andi Kleen
2008-03-10 18:35                     ` Jeremy Fitzhardinge
2008-03-10 19:06                       ` Andi Kleen
2008-03-10 20:54                       ` H. Peter Anvin
2008-03-10 21:26                         ` Jeremy Fitzhardinge
2008-03-11  4:07             ` Nick Piggin
2008-03-21 12:52               ` Bart Van Assche
2008-03-21 14:45                 ` Ingo Molnar
2008-03-26  7:45                   ` Bart Van Assche
2008-03-26  7:53                     ` Andrew Morton
2008-03-26  8:13                     ` Ingo Molnar
2008-03-26 10:37                       ` Bart Van Assche
2008-03-26 16:34                         ` Christoph Lameter
2008-03-27  9:48                           ` Bart Van Assche
2008-03-09 19:11         ` Arjan van de Ven
2008-03-09 19:25           ` Ingo Molnar
2008-03-09 19:27             ` Ingo Molnar
2008-03-09 19:31               ` Ingo Molnar
2008-03-10 15:57               ` Christoph Lameter
2008-03-10 15:55             ` Christoph Lameter [this message]
2008-03-09 12:47       ` KOSAKI Motohiro

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