linux-kernel - Re: FW: [PATCH] powerpc/mm: Export HPAGE

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Message-ID: <20090204061747.GB10229@movementarian.org>
Date:	Wed, 4 Feb 2009 01:17:47 -0500
From:	wli@...ementarian.org
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Roland Dreier <rdreier@...co.com>,
	Eli Cohen <eli@...lanox.co.il>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org
Subject: Re: FW: [PATCH] powerpc/mm: Export HPAGE_SHIFT

On Wed, 04 Feb 2009 12:50:48 +1100 Benjamin Herrenschmidt 
>>> Do the generic hugetlbfs code provides such an API ? If not, we may need
>>> to add one.

On Wednesday 04 February 2009 16:13:29 Andrew Morton wrote:
>> I think it's something like
>> 	huge_page_size(page_hstate(page))

On Wed, Feb 04, 2009 at 04:31:38PM +1100, Nick Piggin wrote:
> That would work if you have a page, yes. If you want to query which hugepage
> sizes are available, then you probably want for_each_hstate() (which is only
> within mm/hugetlb.c at the moment, but I have no objections to exporting it
> and symbols it requires).

Exciting things have happened in mm/hugetlb.c while I was out sick.
I've got quite some catching up to do.


-- wli
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