From: Carsten Otte <cotte@de.ibm.com>
To: Nick Piggin <npiggin@suse.de>
Cc: carsteno@de.ibm.com, Jared Hulbert <jaredeh@gmail.com>,
Linux Memory Management List <linux-mm@kvack.org>,
Martin Schwidefsky <martin.schwidefsky@de.ibm.com>
Subject: Re: [rfc][patch 2/2] xip: support non-struct page memory
Date: Fri, 21 Dec 2007 11:02:19 +0100 [thread overview]
Message-ID: <476B8F2B.7010409@de.ibm.com> (raw)
In-Reply-To: <20071221005049.GC31040@wotan.suse.de>
Nick Piggin wrote:
> You wouldn't even need to store it in the vm_area_struct -- you could just
> set up eg. an rb tree of flash extents, and have a function that looks up
> that tree for you.
We have a list aready, and I don't see the number of plugged extents
get so large that rb tree saves us CPU cycles over a list implementation.
Martin Schwidefsky suggested to use a bit in the page table entry to
prevent refcounting. fault() could set it up proper for xip pages.
That would be way faster then walking a list. Would that be an option?
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next prev parent reply other threads:[~2007-12-21 10:02 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-14 13:38 [rfc][patch 1/2] mm: introduce VM_MIXEDMAP mappings Nick Piggin
2007-12-14 13:41 ` [rfc][patch 2/2] xip: support non-struct page memory Nick Piggin
2007-12-14 13:46 ` Carsten Otte
2007-12-15 1:07 ` Jared Hulbert
2007-12-15 1:17 ` Nick Piggin
2007-12-15 6:47 ` Jared Hulbert
2007-12-19 14:04 ` Carsten Otte
2007-12-20 9:23 ` Jared Hulbert
2007-12-21 0:40 ` Nick Piggin
2007-12-20 13:53 ` Carsten Otte
2007-12-20 14:33 ` Carsten Otte
2007-12-20 14:50 ` Carsten Otte
2007-12-20 17:24 ` Jared Hulbert
2007-12-21 0:12 ` Jared Hulbert
2007-12-21 0:56 ` Nick Piggin
2007-12-21 9:56 ` Carsten Otte
2007-12-21 9:49 ` Carsten Otte
2007-12-21 0:50 ` Nick Piggin
2007-12-21 10:02 ` Carsten Otte [this message]
2007-12-21 10:14 ` Nick Piggin
2007-12-21 10:17 ` Carsten Otte
2007-12-21 10:23 ` Nick Piggin
2007-12-21 10:31 ` Carsten Otte
2007-12-21 0:45 ` Nick Piggin
2007-12-21 10:05 ` Carsten Otte
2007-12-21 10:20 ` Nick Piggin
2007-12-21 10:35 ` Carsten Otte
2007-12-21 10:47 ` Nick Piggin
2007-12-21 19:29 ` Martin Schwidefsky
2008-01-07 4:43 ` [rfc][patch] mm: use a pte bit to flag normal pages Nick Piggin
2008-01-07 4:43 ` Nick Piggin
2008-01-07 10:30 ` Russell King
2008-01-07 10:30 ` Russell King
2008-01-07 11:14 ` Nick Piggin
2008-01-07 11:14 ` Nick Piggin
2008-01-07 18:49 ` Jared Hulbert
2008-01-07 18:49 ` Jared Hulbert
2008-01-07 19:45 ` Russell King
2008-01-07 19:45 ` Russell King
2008-01-07 22:52 ` Jared Hulbert
2008-01-07 22:52 ` Jared Hulbert
2008-01-08 2:37 ` Andi Kleen
2008-01-08 2:37 ` Andi Kleen
2008-01-08 2:49 ` Nick Piggin
2008-01-08 2:49 ` Nick Piggin
2008-01-08 3:31 ` Andi Kleen
2008-01-08 3:31 ` Andi Kleen
2008-01-08 3:52 ` Nick Piggin
2008-01-08 3:52 ` Nick Piggin
2008-01-08 10:11 ` Catalin Marinas
2008-01-08 10:11 ` Catalin Marinas
2008-01-08 10:52 ` Russell King
2008-01-08 10:52 ` Russell King
2008-01-08 13:54 ` Catalin Marinas
2008-01-08 13:54 ` Catalin Marinas
2008-01-08 14:08 ` Russell King
2008-01-08 14:08 ` Russell King
2008-01-10 13:33 ` Carsten Otte
2008-01-10 13:33 ` Carsten Otte
2008-01-10 23:18 ` Nick Piggin
2008-01-10 23:18 ` Nick Piggin
2008-01-08 9:35 ` [rfc][patch 0/4] VM_MIXEDMAP patchset with s390 backend Carsten Otte
2008-01-08 10:08 ` Nick Piggin
2008-01-08 11:34 ` Carsten Otte
2008-01-08 11:55 ` Nick Piggin
2008-01-08 12:03 ` Carsten Otte
2008-01-08 13:56 ` Jörn Engel
2008-01-08 14:51 ` Carsten Otte
2008-01-08 18:09 ` Jared Hulbert
2008-01-08 22:12 ` Nick Piggin
2008-01-09 15:14 ` [rfc][patch 0/4] VM_MIXEDMAP patchset with s390 backend v2 Carsten Otte
[not found] ` <1199891032.28689.9.camel@cotte.boeblingen.de.ibm.com>
2008-01-09 15:14 ` [rfc][patch 1/4] include: add callbacks to toggle reference counting for VM_MIXEDMAP pages Carsten Otte, Carsten Otte
2008-01-09 17:31 ` Martin Schwidefsky
2008-01-09 18:17 ` Jared Hulbert
2008-01-10 7:59 ` Carsten Otte
2008-01-10 20:01 ` Jared Hulbert
2008-01-11 8:45 ` Carsten Otte
2008-01-13 2:44 ` Nick Piggin
2008-01-14 11:36 ` Carsten Otte
2008-01-16 4:04 ` Nick Piggin
2008-01-15 13:05 ` Carsten Otte
2008-01-16 4:22 ` Nick Piggin
2008-01-16 14:29 ` [rft] updated xip patch rollup Nick Piggin
2008-01-17 10:24 ` Carsten Otte
2008-01-10 20:23 ` [rfc][patch 1/4] include: add callbacks to toggle reference counting for VM_MIXEDMAP pages Jared Hulbert
2008-01-11 8:32 ` Carsten Otte
2008-01-10 0:20 ` Nick Piggin
2008-01-10 8:06 ` Carsten Otte
2008-01-09 15:14 ` [rfc][patch 2/4] mm: introduce VM_MIXEDMAP Carsten Otte, Jared Hulbert, Carsten Otte
2008-01-09 15:14 ` [rfc][patch 3/4] Convert XIP to support non-struct page backed memory Carsten Otte, Nick Piggin
2008-01-09 15:14 ` [rfc][patch 4/4] s390: remove struct page entries for DCSS memory segments Carsten Otte, Carsten Otte
[not found] ` <1199784196.25114.11.camel@cotte.boeblingen.de.ibm.com>
2008-01-08 9:35 ` [rfc][patch 1/4] mm: introduce VM_MIXEDMAP Carsten Otte, Jared Hulbert, Carsten Otte
2008-01-08 9:35 ` [rfc][patch 2/4] xip: support non-struct page memory Carsten Otte, Nick Piggin, Carsten Otte
2008-01-08 9:36 ` [rfc][patch 3/4] s390: remove sturct page entries for z/VM DCSS memory segments Carsten Otte
2008-01-08 9:36 ` [rfc][patch 4/4] s390: mixedmap_refcount_pfn implementation using list walk Carsten Otte
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