I always want to know which chips and devices
determine the hugepages. Could you tell me?
Any help will be appreciated.
--Easley
------------------ Original ------------------
From: "David Gibson"<da...@gibson.dropbear.id.au>;
Date: Wed, Nov 16, 2011 04:42 PM
To: "Easley"<ugi...@gmail.com>;
Cc: "bill4carson"<bill4car...@gmail.com>; "Eric B Munson"<emun...@mgebm.net>;
"libhugetlbfs-devel"<libhugetlbfs-devel@lists.sourceforge.net>;
Subject: Re: [Libhugetlbfs-devel] How to change the hugepagesize?
On Wed, Nov 16, 2011 at 03:07:04PM +0800, Easley wrote:
> I really want to know why I cannot change it.
> It locked by hardware or os?
Only certain page sizes are supported by the hardware, you don't get
to chose anything you want.
> If I change and recompile the kernel, may I make it support?
No.
> Can I change hugepagesize to bigger or smaller
> than 16MB on PPC? Such as 32MB or 4MB.
In short, no.
For powerpcpc server chips, essentially all support 16MB pages, many
support 64k, a few support 1MB and some support 16GB. Embedded ppc
chips tend to be more flexible though exactly which sizes are
supported varies.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
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