From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Andrew Morton <akpm@osdl.org>, Hugh Dickins <hugh@veritas.com>,
mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 01/15] mm: poison struct page for ptlock
Date: Fri, 11 Nov 2005 00:10:44 +0000 [thread overview]
Message-ID: <20051111001044.GD28700@flint.arm.linux.org.uk> (raw)
In-Reply-To: <Pine.LNX.4.64.0511101155160.4627@g5.osdl.org>
On Thu, Nov 10, 2005 at 11:56:52AM -0800, Linus Torvalds wrote:
> On Thu, 10 Nov 2005, Andrew Morton wrote:
> >
> > IOW we're assuming that no 32-bit architectures will obtain pagetables from
> > slab?
>
> I thought ARM does?
ARM26 does. On ARM, we play some games to weld to page tables together.
(We also duplicate them to give us a level of independence from the MMU
architecture and to give us space for things like young and dirty bits.)
As far as Linux is concerned, a 2nd level page table is one struct page
and L1 entries are two words in size.
I wrote up some docs on this and threw them into a comment in
include/asm-arm/pgtable.h...
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
next prev parent reply other threads:[~2005-11-11 0:10 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-10 1:42 [PATCH 00/15] mm: struct page lock and counts Hugh Dickins
2005-11-10 1:43 ` [PATCH 01/15] mm: poison struct page for ptlock Hugh Dickins
2005-11-10 2:10 ` Andrew Morton
2005-11-10 2:22 ` Hugh Dickins
2005-11-10 2:56 ` Andrew Morton
2005-11-10 2:58 ` Andrew Morton
2005-11-10 11:28 ` Ingo Molnar
2005-11-10 12:06 ` Ingo Molnar
2005-11-10 12:26 ` Andrew Morton
2005-11-10 21:37 ` Christoph Lameter
2005-11-10 21:52 ` Christoph Hellwig
2005-11-11 10:46 ` Ingo Molnar
2005-11-12 23:48 ` Adrian Bunk
2005-11-10 12:35 ` Hugh Dickins
2005-11-10 12:51 ` Andrew Morton
2005-11-10 13:29 ` Hugh Dickins
2005-11-10 15:00 ` Ingo Molnar
2005-11-10 15:38 ` Hugh Dickins
2005-11-10 19:49 ` Andrew Morton
2005-11-10 19:56 ` Linus Torvalds
2005-11-11 0:10 ` Russell King [this message]
2005-11-12 6:27 ` Benjamin Herrenschmidt
2005-11-11 15:02 ` Hugh Dickins
2005-11-15 18:49 ` Andrew Morton
2005-11-15 19:51 ` Hugh Dickins
2005-11-15 20:05 ` Andrew Morton
2005-11-10 1:44 ` [PATCH 02/15] mm: revert page_private Hugh Dickins
2005-11-10 1:46 ` [PATCH 03/15] mm reiser4: " Hugh Dickins
2005-11-10 1:47 ` [PATCH 04/15] mm: update split ptlock Kconfig Hugh Dickins
2005-11-10 1:48 ` [PATCH 05/15] mm: unbloat get_futex_key Hugh Dickins
2005-11-10 1:50 ` [PATCH 06/15] mm: remove ppc highpte Hugh Dickins
2005-11-10 1:52 ` Benjamin Herrenschmidt
2005-11-10 1:55 ` Paul Mackerras
2005-11-10 2:46 ` Hugh Dickins
2005-11-10 1:51 ` [PATCH 07/15] mm: powerpc ptlock comments Hugh Dickins
2005-11-10 1:53 ` [PATCH 08/15] mm: powerpc init_mm without ptlock Hugh Dickins
2005-11-10 1:56 ` [PATCH 09/15] mm: fill arch atomic64 gaps Hugh Dickins
2005-11-10 13:38 ` Andi Kleen
2005-11-10 15:19 ` Hugh Dickins
2005-11-10 1:57 ` [PATCH 10/15] mm: atomic64 page counts Hugh Dickins
2005-11-10 2:16 ` Andrew Morton
2005-11-10 2:33 ` Hugh Dickins
2005-11-10 3:01 ` Andrew Morton
2005-11-10 21:43 ` Christoph Lameter
2005-11-10 21:53 ` Andrew Morton
2005-11-11 15:25 ` Hugh Dickins
2005-11-11 18:03 ` Christoph Lameter
2005-11-10 2:00 ` [PATCH 11/15] mm: long " Hugh Dickins
2005-11-10 2:01 ` [PATCH 12/15] mm reiser4: " Hugh Dickins
2005-11-10 2:03 ` [PATCH 13/15] mm: get_user_pages check count Hugh Dickins
2005-11-10 2:08 ` [PATCH 14/15] mm: inc_page_table_pages check max Hugh Dickins
2005-11-10 2:09 ` [PATCH 15/15] mm: remove install_page limit Hugh Dickins
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