From: "Jared Hulbert" <jaredeh@gmail.com>
To: carsteno@de.ibm.com
Cc: Nick Piggin <npiggin@suse.de>,
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: Thu, 20 Dec 2007 09:24:54 -0800 [thread overview]
Message-ID: <6934efce0712200924o4e676484j95188a01b605bfdc@mail.gmail.com> (raw)
In-Reply-To: <476A8133.5050809@de.ibm.com>
> A poor man's solution could be, to store a pfn range of the flash chip
> and/or shared memory segment inside vm_area_struct, and in case of
> VM_MIXEDMAP we check if the pfn matches that range. If so: no
> refcounting. If not: regular refcounting. Is that an option?
I'm not picturing what is responsible for configuring this stored pfn
range. Does the fs do it on mount? Does the MTD or your funky
direct_access block driver do it?
What if you use VM_PFNMAP instead of VM_MIXEDMAP?
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next prev parent reply other threads:[~2007-12-20 17:24 UTC|newest]
Thread overview: 79+ 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 [this message]
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
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 10:30 ` Russell King
2008-01-07 11:14 ` Nick Piggin
2008-01-07 18:49 ` Jared Hulbert
2008-01-07 19:45 ` Russell King
2008-01-07 22:52 ` Jared Hulbert
2008-01-08 2:37 ` Andi Kleen
2008-01-08 2:49 ` Nick Piggin
2008-01-08 3:31 ` Andi Kleen
2008-01-08 3:52 ` Nick Piggin
2008-01-08 10:11 ` Catalin Marinas
2008-01-08 10:52 ` Russell King
2008-01-08 13:54 ` Catalin Marinas
2008-01-08 14:08 ` Russell King
2008-01-10 13:33 ` Carsten Otte
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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