linux-kernel - Re: [PATCH] MM: Support more pagesizes for MAP_HUGETLB/SHM

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Message-ID: <1350956709.2728.20.camel@pasglop>
Date:	Tue, 23 Oct 2012 12:45:09 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	mtk.manpages@...il.com
Cc:	Andi Kleen <andi@...stfloor.org>, Andi Kleen <ak@...ux.intel.com>,
	akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Hillf Danton <dhillf@...il.com>
Subject: Re: [PATCH] MM: Support more pagesizes for MAP_HUGETLB/SHM_HUGETLB
 v6

On Mon, 2012-10-22 at 18:23 +0200, Michael Kerrisk (man-pages) wrote:
> Since PowerPC already allows 16GB page sizes, doesn't there need to be
> allowance for the possibility of future expansion? Choosing a larger
> minimum size (like 2^16) would allow that. Does the minimum size need
> to be 16k? (Surely, if you want a HUGEPAGE, you want a bigger page
> than that? I am not sure.)

I can't say for sure what we're going to come up with in 5 years but so
far, I am not aware of plans to go beyond 16G just yet :-)

Cheers,
Ben.


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