From: "David Mosberger-Tang" <dmosberger@gmail.com>
To: Peter Chubb <peterc@gelato.unsw.edu.au>
Cc: David Miller <davem@davemloft.net>,
clameter@sgi.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
torvalds@linux-foundation.org, ianw@gelato.unsw.edu.au
Subject: Re: larger default page sizes...
Date: Wed, 26 Mar 2008 00:34:13 +0000 [thread overview]
Message-ID: <ed5aea430803251734u70f199w10951bc4f0db6262@mail.gmail.com> (raw)
In-Reply-To: <87tziu5q37.wl%peter@chubb.wattle.id.au>
On Tue, Mar 25, 2008 at 5:41 PM, Peter Chubb <peterc@gelato.unsw.edu.au> wrote:
> The main issue is that, at least on Itanium, you have to turn off the hardware
> page table walker for hugepages if you want to mix superpages and
> standard pages in the same region. (The long format VHPT isn't the
> panacea we'd like it to be because the hash function it uses depends
> on the page size).
Why not just repeat the PTEs for super-pages? That won't work for
huge pages, but for superpages that are a reasonable multiple (e.g.,
16-times) the base-page size, it should work nicely.
--david
--
Mosberger Consulting LLC, http://www.mosberger-consulting.com/
next prev parent reply other threads:[~2008-03-26 0:34 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080321061726.782068299@sgi.com>
[not found] ` <20080321.002502.223136918.davem@davemloft.net>
[not found] ` <Pine.LNX.4.64.0803211037140.18671@schroedinger.engr.sgi.com>
[not found] ` <20080321.145712.198736315.davem@davemloft.net>
2008-03-24 18:27 ` [11/14] vcompound: Fallbacks for order 1 stack allocations on Christoph Lameter
2008-03-24 20:37 ` larger default page sizes David Miller
2008-03-24 21:05 ` Christoph Lameter
2008-03-24 21:43 ` David Miller
2008-03-25 17:48 ` Christoph Lameter
2008-03-25 23:22 ` David Miller
2008-03-25 23:41 ` Peter Chubb
2008-03-25 23:49 ` David Miller
2008-03-26 0:25 ` Peter Chubb
2008-03-26 0:31 ` David Miller
2008-03-26 0:34 ` David Mosberger-Tang [this message]
2008-03-26 0:39 ` David Miller
2008-03-26 0:57 ` Peter Chubb
2008-03-26 4:16 ` John Marvin
2008-03-26 4:36 ` David Miller
2008-03-24 21:25 ` Luck, Tony
2008-03-24 21:46 ` David Miller
2008-03-25 3:29 ` Paul Mackerras
2008-03-25 4:15 ` David Miller
2008-03-25 11:50 ` Paul Mackerras
2008-03-25 23:32 ` David Miller
2008-03-25 23:49 ` Luck, Tony
2008-03-26 0:16 ` David Miller
2008-03-26 15:54 ` Nish Aravamudan
2008-03-26 17:05 ` Luck, Tony
2008-03-26 18:54 ` Mel Gorman
2008-03-25 12:05 ` Andi Kleen
2008-03-25 21:27 ` Paul Mackerras
2008-03-26 5:24 ` Paul Mackerras
2008-03-26 15:59 ` Linus Torvalds
2008-03-27 1:08 ` Paul Mackerras
2008-03-26 17:56 ` Christoph Lameter
2008-03-26 23:21 ` David Miller
2008-03-27 3:00 ` Paul Mackerras
2008-03-25 18:27 ` Dave Hansen
2008-03-24 21:13 ` [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86 Luck, Tony
2008-03-25 17:42 ` [11/14] vcompound: Fallbacks for order 1 stack allocations on Christoph Lameter
2008-03-25 19:09 ` [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86 Luck, Tony
2008-03-25 19:25 ` [11/14] vcompound: Fallbacks for order 1 stack allocations on Christoph Lameter
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