From: "David S. Miller" <davem@redhat.com>
To: akpm@zip.com.au
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
rohit.seth@intel.com, sunil.saxena@intel.com,
asit.k.mallick@intel.com
Subject: Re: large page patch
Date: Thu, 01 Aug 2002 18:19:44 -0700 (PDT) [thread overview]
Message-ID: <20020801.181944.09310618.davem@redhat.com> (raw)
In-Reply-To: <3D49DFD0.FE0DBC1D@zip.com.au>
From: Andrew Morton <akpm@zip.com.au>
Date: Thu, 01 Aug 2002 18:26:40 -0700
"David S. Miller" wrote:
> This is probably done to increase the likelyhood that 4MB page orders
> are available. If we collapse 4MB pages deeper, they are less likely
> to be broken up because smaller orders would be selected first.
This is leakage from ia64, which supports up to 256k pages.
Ummm, 4MB > 256K and even with a 4K PAGE_SIZE MAX_ORDER coalesces
up to 4MB already :-)
Apparently a page-table based representation could not be used by PPC.
The page-table is just an abstraction, there is no reason dummy
"large" ptes could not be used which are just ignored by the HW TLB
reload code.
next prev parent reply other threads:[~2002-08-02 1:28 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-02 0:37 large page patch Andrew Morton
2002-08-02 0:43 ` David S. Miller
2002-08-02 1:26 ` Andrew Morton
2002-08-02 1:19 ` David S. Miller [this message]
2002-08-02 3:23 ` Linus Torvalds
2002-08-02 1:55 ` Rik van Riel
2002-08-02 1:50 ` David S. Miller
2002-08-02 2:29 ` Gerrit Huizenga
2002-08-02 2:23 ` David S. Miller
2002-08-02 2:53 ` Gerrit Huizenga
2002-08-02 5:24 ` David Mosberger
2002-08-02 5:20 ` David S. Miller
2002-08-02 6:26 ` David Mosberger
2002-08-02 6:33 ` Martin J. Bligh
2002-08-02 6:44 ` David Mosberger
2002-08-02 10:00 ` Marcin Dalecki
2002-08-02 7:08 ` Andrew Morton
2002-08-02 7:15 ` William Lee Irwin III
2002-08-02 8:20 ` David S. Miller
2002-08-02 9:05 ` Ryan Cumming
2002-08-02 9:06 ` David S. Miller
2002-08-02 12:52 ` Rik van Riel
2002-08-02 13:29 ` What does this error mean? "local symbols in discarded section .text.exit" jeff millar
2002-08-02 13:52 ` Jose Luis Domingo Lopez
2002-08-02 22:50 ` jeff millar
2002-08-02 23:04 ` Thunder from the hill
2002-08-02 15:27 ` large page patch David Mosberger
2002-08-02 1:09 ` Martin J. Bligh
2002-08-02 4:07 ` Linus Torvalds
2002-08-02 4:13 ` David S. Miller
2002-08-02 4:30 ` William Lee Irwin III
2002-08-02 4:32 ` Linus Torvalds
2002-08-02 5:11 ` William Lee Irwin III
2002-08-02 7:30 ` Andrew Morton
2002-08-02 4:38 ` Martin J. Bligh
2002-08-02 1:36 ` Andrew Morton
2002-08-02 4:31 ` Daniel Phillips
2002-08-02 4:47 ` Andrew Morton
2002-08-02 3:47 ` William Lee Irwin III
2002-08-02 23:40 ` Chris Wedgwood
-- strict thread matches above, loose matches on Subject: below --
2002-08-02 1:34 Seth, Rohit
2002-08-02 19:31 Seth, Rohit
[not found] <Pine.LNX.4.33.0208012133111.1857-100000@penguin.transmeta.com>
2002-08-06 20:51 ` Hugh Dickins
2002-08-07 0:11 Seth, Rohit
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