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From: Andrew Morton <akpm@linux-foundation.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	LKML <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Christoph Lameter <clameter@sgi.com>,
	Bart Van Assche <bart.vanassche@gmail.com>
Subject: Re: quicklists confuse meminfo
Date: Sun, 9 Mar 2008 11:46:40 -0700	[thread overview]
Message-ID: <20080309114640.85c9c3eb.akpm@linux-foundation.org> (raw)
In-Reply-To: <20080309123432.GA3267@elte.hu>

On Sun, 9 Mar 2008 13:34:32 +0100 Ingo Molnar <mingo@elte.hu> wrote:

> the right solution is to get rid of quicklists altogether

Yes, I think so.

- They are pretty marginal from a performance POV (iirc)

- They've been a relatively rich source of bugs

- As I said when we merged them (under protest): Private object caches
  like this are just a bad idea - caches should be *shared*, because some
  other code path which wants a zeroed page wants a cache-warm one, not a
  cache-cold one from the allocator (iirc there was doubt over how
  cache-warm these pages are, however).

  Making __GFP_ZERO smarter/more efficient would be a preferable way of
  addressing any performance problems we have in there.

  parent reply	other threads:[~2008-03-09 18:47 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-09 10:19 quicklists confuse meminfo 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 [this message]
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
2008-03-09 12:47       ` KOSAKI Motohiro

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