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RE: larger default page sizes...

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From: Luck, Tony <tony.luck@...>
To: David Miller <davem@...>, <clameter@...>
Cc: <linux-mm@...>, <linux-kernel@...>, <linux-ia64@...>, <torvalds@...>
Subject: RE: larger default page sizes...
Date: Monday, March 24, 2008 - 5:25 pm

> The memory wastage is just rediculious.

In an ideal world we'd have variable sized pages ... but
since most arcthitectures have no h/w support for these
it may be a long time before that comes to Linux.

In a fixed page size world the right page size to use
depends on the workload and the capacity of the system.

When memory capacity is measured in hundreds of GB, then
a larger page size doesn't look so ridiculous.

-Tony
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[11/14] vcompound: Fallbacks for order 1 stack allocations o..., Christoph Lameter, (Fri Mar 21, 2:17 am)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Andi Kleen, (Fri Mar 21, 6:30 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Christoph Lameter, (Mon Mar 24, 3:53 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Andi Kleen, (Tue Mar 25, 3:51 am)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Christoph Lameter, (Tue Mar 25, 1:55 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Andi Kleen, (Tue Mar 25, 2:07 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., David Miller, (Fri Mar 21, 3:25 am)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Christoph Lameter, (Fri Mar 21, 1:40 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., David Miller, (Fri Mar 21, 5:57 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Christoph Lameter, (Mon Mar 24, 2:27 pm)
larger default page sizes..., David Miller, (Mon Mar 24, 4:37 pm)
Re: larger default page sizes..., Christoph Lameter, (Mon Mar 24, 5:05 pm)
Re: larger default page sizes..., David Miller, (Mon Mar 24, 5:43 pm)
Re: larger default page sizes..., Christoph Lameter, (Tue Mar 25, 1:48 pm)
Re: larger default page sizes..., David Miller, (Tue Mar 25, 7:22 pm)
Re: larger default page sizes..., Peter Chubb, (Tue Mar 25, 7:41 pm)
Re: larger default page sizes..., David Mosberger-Tang, (Tue Mar 25, 8:34 pm)
Re: larger default page sizes..., Peter Chubb, (Tue Mar 25, 8:57 pm)
Re: larger default page sizes..., John Marvin, (Wed Mar 26, 12:16 am)
Re: larger default page sizes..., David Miller, (Wed Mar 26, 12:36 am)
Re: larger default page sizes..., David Miller, (Tue Mar 25, 8:39 pm)
Re: larger default page sizes..., David Miller, (Tue Mar 25, 7:49 pm)
Re: larger default page sizes..., Peter Chubb, (Tue Mar 25, 8:25 pm)
Re: larger default page sizes..., David Miller, (Tue Mar 25, 8:31 pm)
RE: larger default page sizes..., Luck, Tony, (Mon Mar 24, 5:25 pm)
Re: larger default page sizes..., David Miller, (Mon Mar 24, 5:46 pm)
Re: larger default page sizes..., Paul Mackerras, (Mon Mar 24, 11:29 pm)
Re: larger default page sizes..., Andi Kleen, (Tue Mar 25, 8:05 am)
Re: larger default page sizes..., Paul Mackerras, (Wed Mar 26, 1:24 am)
Re: larger default page sizes..., Christoph Lameter, (Wed Mar 26, 1:56 pm)
Re: larger default page sizes..., Paul Mackerras, (Wed Mar 26, 11:00 pm)
Re: larger default page sizes..., David Miller, (Wed Mar 26, 7:21 pm)
Re: larger default page sizes..., Linus Torvalds, (Wed Mar 26, 11:59 am)
Re: larger default page sizes..., Paul Mackerras, (Wed Mar 26, 9:08 pm)
Re: larger default page sizes..., Paul Mackerras, (Tue Mar 25, 5:27 pm)
Re: larger default page sizes..., David Miller, (Tue Mar 25, 12:15 am)
Re: larger default page sizes..., Paul Mackerras, (Tue Mar 25, 7:50 am)
Re: larger default page sizes..., David Miller, (Tue Mar 25, 7:32 pm)
RE: larger default page sizes..., Luck, Tony, (Tue Mar 25, 7:49 pm)
Re: larger default page sizes..., Nish Aravamudan, (Wed Mar 26, 11:54 am)
RE: larger default page sizes..., Luck, Tony, (Wed Mar 26, 1:05 pm)
Re: larger default page sizes..., Mel Gorman, (Wed Mar 26, 2:54 pm)
Re: larger default page sizes..., David Miller, (Tue Mar 25, 8:16 pm)
Re: larger default page sizes..., Dave Hansen, (Tue Mar 25, 2:27 pm)
RE: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Luck, Tony, (Mon Mar 24, 5:13 pm)
RE: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Christoph Lameter, (Tue Mar 25, 1:42 pm)
RE: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Luck, Tony, (Tue Mar 25, 3:09 pm)
RE: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Christoph Lameter, (Tue Mar 25, 3:25 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Ingo Molnar, (Fri Mar 21, 4:39 am)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Christoph Lameter, (Fri Mar 21, 1:33 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Ingo Molnar, (Fri Mar 21, 3:02 pm)
Re: [11/14] vcompound: Fallbacks for order 1 stack allocatio..., Christoph Lameter, (Fri Mar 21, 3:04 pm)