Date: Sun, 9 Mar 2008 11:46:40 -0700
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
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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.
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