From: olof@lixom.net (Olof Johansson)
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>,
"cbe-oss-dev@ozlabs.org" <cbe-oss-dev@ozlabs.org>
Subject: Re: [PATCH] powerpc: Introduce address space "slices"
Date: Mon, 19 Feb 2007 09:33:15 -0600 [thread overview]
Message-ID: <20070219153315.GA5036@lixom.net> (raw)
In-Reply-To: <1171867418.18571.3.camel@localhost.localdomain>
On Mon, Feb 19, 2007 at 05:43:38PM +1100, Benjamin Herrenschmidt wrote:
> powerpc: Introduce address space "slices"
>
> This patch provide some infrastructure that will allow proper creation
> of special VMAs with different page sizes on powerpc.
>
> The basic issue is to be able to do what hugetlbfs does but with
> different page sizes for some other special filesystems, more
> specifically, my need is:
>
> - hugetlbfs should still work of course :-)
>
> - SPE local store mappings using 64K pages on a 4K base page size
> kernel on Cell
Why? What is the reason they can't use 4K pages?
> - Some special 4K segments in 64K pages kernels for mapping a dodgy
> specie of powerpc specific infiniband hardware that requires 4K MMU
> mappings for various reasons I won't explain here.
-Olof
next prev parent reply other threads:[~2007-02-19 15:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-19 6:43 [PATCH] powerpc: Introduce address space "slices" Benjamin Herrenschmidt
2007-02-19 13:23 ` Jimi Xenidis
2007-02-19 19:42 ` Benjamin Herrenschmidt
2007-02-19 19:57 ` Jimi Xenidis
2007-02-19 15:33 ` Olof Johansson [this message]
2007-02-19 16:49 ` [Cbe-oss-dev] " Arnd Bergmann
2007-02-19 19:39 ` Benjamin Herrenschmidt
2007-02-19 20:15 ` Olof Johansson
2007-02-19 18:54 ` Adam Litke
2007-02-19 19:40 ` Benjamin Herrenschmidt
2007-02-19 20:35 ` Adam Litke
2007-02-19 20:47 ` Benjamin Herrenschmidt
2007-02-19 21:15 ` Adam Litke
2007-02-20 19:45 ` Adam Litke
2007-02-20 19:51 ` Benjamin Herrenschmidt
2007-02-20 20:07 ` Adam Litke
2007-02-21 0:29 ` David Gibson
2007-02-21 0:40 ` Benjamin Herrenschmidt
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