linux-kernel - Re: PAGE_SIZE Availability Inconsistency

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Message-ID: <45F08C60.6010404@zytor.com>
Date:	Thu, 08 Mar 2007 14:21:20 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Avi Kivity <avi@...o.co.il>
CC:	David Miller <davem@...emloft.net>, dmlb2000@...il.com,
	linux-kernel@...r.kernel.org
Subject: Re: PAGE_SIZE Availability Inconsistency

Avi Kivity wrote:
>>
>> It definitely should, especially on x86-64, where the page size isn't 
>> guaranteed by the ABI (on i386, the ABI guarantees a 4K page size; on 
>> x86-64 it can be up to 64K.)
> 
> Wouldn't that be ia64?

No, the x86-64 EFI ABI permits page sizes up to 64K.  Currently, of 
course, the only page size in use is 4K, but unlike i386 that's not 
guaranteed by the ABI.  At least AMD has indicated that they are 
considering introducing larger page size support in future hardware.

	-hpa
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