From: torvalds@transmeta.com (Linus Torvalds)
To: linux-kernel@vger.kernel.org
Subject: Re: large page patch
Date: Fri, 2 Aug 2002 03:23:39 +0000 (UTC) [thread overview]
Message-ID: <aictvr$1dd$1@penguin.transmeta.com> (raw)
In-Reply-To: 20020801.181944.09310618.davem@redhat.com
In article <20020801.181944.09310618.davem@redhat.com>,
David S. Miller <davem@redhat.com> wrote:
> 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 :-)
That should be 256_M_ pages (13 bits of page size + 15 bits of MAX_ORDER
gives you 256MB max).
Linus
next prev parent reply other threads:[~2002-08-02 3:20 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
2002-08-02 3:23 ` Linus Torvalds [this message]
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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