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

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Date:	Fri, 23 Mar 2007 08:03:46 -0700
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Ken Chen <kenchen@...gle.com>
Cc:	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, Mar 23, 2007 at 01:44:38AM -0700, Ken Chen wrote:
> I think we have enough infrastructure currently in hugetlbfs to
> implement what Adam wants for something like a /dev/hugetlb char
> device (except we can't afford to have a zero hugetlb page since it
> will be too costly on some arch).
> I really like the idea of having something similar to /dev/zero for
> hugetlb page.  So I coded it up on top of existing hugetlbfs.  The
> core change is really small and half of the patch is really just
> moving things around.  I think this at least can partially fulfill the
> goal.
> Signed-off-by: Ken Chen <kenchen@...gle.com>

I like this patch a lot, though I'm not likely to get around to testing
it today. If userspace testcode is available that would be great to see
posted so I can just boot into things and run that.


-- wli
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