linux-kernel - Re: [QUICKLIST 0/4] Arch independent quicklists V2

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Message-ID: <87hcsoakau.wl%peterc@chubb.wattle.id.au>
Date:	Wed, 14 Mar 2007 08:46:33 +1100
From:	Peter Chubb <peterc@...bb.wattle.id.au>
To:	Jeremy Fitzhardinge <jeremy@...p.org>, ianw@...ato.unsw.edu.au
Cc:	Matt Mackall <mpm@...enic.com>, David Miller <davem@...emloft.net>,
	nickpiggin@...oo.com.au, akpm@...ux-foundation.org,
	clameter@....com, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [QUICKLIST 0/4] Arch independent quicklists V2

>>>>> "Jeremy" == Jeremy Fitzhardinge <jeremy@...p.org> writes:

Jeremy> And do the same in pte pages for actual mapped pages?  Or do
Jeremy> you think they would be too densely populated for it to be
Jeremy> worthwhile?

We've been doing some measurements on how densely clumped ptes are.
On 32-bit platforms, they're pretty dense.  On IA64, quite a bit
sparser, depending on the workload of course.  I think that's mostly because
of the larger pagesize on IA64 -- with 64k pages, you don't need very
many to map a small object.

I'm hoping IanW can give more details.
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