linux-kernel - Re: [patch] rfc: introduce /dev/hugetlb

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Date:	Fri, 23 Mar 2007 15:15:55 +0000 (GMT)
From:	Mel Gorman <mel@....ul.ie>
To:	William Lee Irwin III <wli@...omorphy.com>
Cc:	Ken Chen <kenchen@...gle.com>, Adam Litke <agl@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Christoph Hellwig <hch@...radead.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] rfc: introduce /dev/hugetlb

On Fri, 23 Mar 2007, William Lee Irwin III wrote:

> On Fri, 23 Mar 2007, Ken Chen wrote:
>>> -#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
>>> -unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long
>>> addr,
>>> -		unsigned long len, unsigned long pgoff, unsigned long flags);
>>> -#else
>>> -static unsigned long
>>> +unsigned long
>>> hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
>>> 		unsigned long len, unsigned long pgoff, unsigned long flags)
>>
> On Fri, Mar 23, 2007 at 03:03:57PM +0000, Mel Gorman wrote:
>> What is going on here? Why do arches not get to specify a
>> get_unmapped_area any more?
>
> Lack of compiletesting beyond x86-64 in all probability.
>

Ok, this will go kablamo on Power then even if it compiles. I don't 
consider it a fundamental problem though. For the purposes of an RFC, it's 
grand and something that can be worked with.

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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