linux-kernel - Re: HugeTLB: Driver example

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Date:	Thu, 17 Sep 2009 18:42:20 +1200
From:	Alexey Korolev <akorolex@...il.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Mel Gorman <mel@....ul.ie>, Eric Munson <linux-mm@...bm.net>,
	Alexey Korolev <akorolev@...radead.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: HugeTLB: Driver example

>> There is an example of simple driver which provides huge pages mapping
>> for user level applications. The  procedure for mapping of huge pages
>> to userspace by the driver is:
>>
>> 1. Create a hugetlb file on vfs mount of hugetlbfs (h_file)
>
> Note that to get your support code included at all you'll need a real
> intree driver, not just an example.  That is if VM people are happy with
> the general concept.
Hi,
The driver example listed here takes the same approach as already done
inside ipc/shm.c. So people can refer this file for development. The
patches just make existing functions more usable by drivers and this
example is an extract of ipc/shm.c in order to give pretty simple
how-to.
Seems I gave a not so good description for this patch set so it caused
a lot of misunderstanding, sorry about that.

Thanks,
Alexey
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