From: Mel Gorman <mel@csn.ul.ie>
To: Franck <vagabon.xyz@gmail.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.17-mm1
Date: Thu, 22 Jun 2006 16:54:06 +0100 (IST) [thread overview]
Message-ID: <Pine.LNX.4.64.0606221649070.5869@skynet.skynet.ie> (raw)
In-Reply-To: <449ABC3E.5070609@innova-card.com>
On Thu, 22 Jun 2006, Franck Bui-Huu wrote:
> Mel Gorman wrote:
>> On Thu, 22 Jun 2006, Franck Bui-Huu wrote:
>>>
>>> Should ARCH_PFN_OFFSET macro be used instead in order to make pfn/page
>>> convertions work when node 0 start offset do not start at 0 ?
>>>
>>
>> What happens if you have ARCH_PFN_OFFSET as
>>
>> #define ARCH_PFN_OFFSET (0UL)
>>
>> ?
>
> It's the default value (see memory_model.h). It means that pfn start
> for node 0 is 0, therefore your physical memory address starts at 0.
>
I know, but what I'm getting at is that ARCH_PFN_OFFSET may be unnecessary
with flatmem-relax-requirement-for-memory-to-start-at-pfn-0.patch applied.
ARCH_PFN_OFFSET is used as
#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + \
ARCH_PFN_OFFSET)
because it knew that the map may not start at PFN 0. With
flatmem-relax-requirement-for-memory-to-start-at-pfn-0.patch, the map will
start at PFN 0 even if physical memory does not start until later.
>>
>> What arch is this?
>>
>
> well I'm working on MIPS, but you can take a look at ARM that does the
> same thing better...
>
>>> My physical memory start at 0x20000000. So node 0 starts at an offset
>>> different from 0. I setup ARCH_PFN_OFFSET this way
>>>
>>> #define ARCH_PFN_OFFSET (0x20000000 << PAGE_SHIFT)
>>>
>>
>> If physical memory starts at 0x20000000, why is the PFN not
>> 0x20000000 >> PAGE_SHIFT ?
>>
>
> It is a typo...
>
ok
--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
next prev parent reply other threads:[~2006-06-22 15:54 UTC|newest]
Thread overview: 137+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-21 10:48 2.6.17-mm1 Andrew Morton
2006-06-21 11:07 ` 2.6.17-mm1 Michal Piotrowski
2006-06-21 11:17 ` 2.6.17-mm1 Andrew Morton
2006-06-21 11:29 ` 2.6.17-mm1 Michal Piotrowski
2006-06-21 13:53 ` 2.6.17-mm1 Cedric Le Goater
2006-06-21 14:13 ` 2.6.17-mm1 Michal Piotrowski
2006-06-21 16:44 ` 2.6.17-mm1 H. Peter Anvin
2006-06-21 19:26 ` 2.6.17-mm1 Cedric Le Goater
2006-06-21 21:46 ` 2.6.17-mm1 Michal Piotrowski
2006-06-21 11:28 ` 2.6.17-mm1 Andrew Morton
2006-06-21 15:35 ` 2.6.17-mm1 Christoph Lameter
2006-06-21 12:06 ` 2.6.17-mm1 Michal Piotrowski
2006-06-21 15:10 ` [-mm patch] drivers/net/ni5010.c: fix compile error Adrian Bunk
2006-06-22 8:13 ` Andreas Mohr
2006-06-22 8:45 ` Adrian Bunk
2006-06-21 18:22 ` [PATCH] pi-futex-rt-mutex-core-merge.patch (was Re: 2.6.17-mm1 Valdis.Kletnieks
2006-06-21 21:48 ` swsusp regression [Was: 2.6.17-mm1] Jiri Slaby
2006-06-21 22:14 ` Mattia Dongili
2006-06-21 22:18 ` Mattia Dongili
2006-06-22 6:19 ` [linux-pm] " Greg KH
2006-06-22 7:46 ` Andrew Morton
2006-06-22 8:25 ` Jeremy Fitzhardinge
2006-06-22 15:51 ` Alan Stern
2006-06-22 17:17 ` Jeremy Fitzhardinge
2006-06-22 18:46 ` Greg KH
2006-06-22 19:07 ` Greg KH
2006-06-22 19:57 ` Alan Stern
2006-06-22 20:22 ` Greg KH
2006-06-22 20:38 ` Jiri Slaby
2006-06-22 21:09 ` Alan Stern
2006-06-22 21:11 ` Greg KH
2006-06-22 16:04 ` Frederik Deweerdt
2006-06-22 16:25 ` Andrew Morton
2006-06-22 19:07 ` Frederik Deweerdt
2006-06-23 9:02 ` Frederik Deweerdt
2006-06-23 9:10 ` Pavel Machek
2006-06-23 9:31 ` Andrew Morton
2006-06-23 12:12 ` Frederik Deweerdt
2006-06-23 12:57 ` Pavel Machek
2006-06-23 13:47 ` Frederik Deweerdt
2006-06-23 19:57 ` Andrew Morton
2006-06-26 9:00 ` Frederik Deweerdt
2006-06-23 19:41 ` Russell King
2006-06-23 20:22 ` Dave Jones
2006-06-23 21:10 ` Rafael J. Wysocki
2006-06-23 22:11 ` Pavel Machek
2006-06-23 23:53 ` Frederik Deweerdt
2006-06-24 17:16 ` Rafael J. Wysocki
2006-06-21 21:57 ` [-mm patch] drivers/acpi/scan.c: make acpi_bus_type static Adrian Bunk
2006-06-21 21:57 ` [-mm patch] drivers/ide/legacy/ide-cs.c: make 2 functions static Adrian Bunk
2006-06-21 21:57 ` [-mm patch] drivers/md/md.c: make code static Adrian Bunk
2006-06-21 21:57 ` [-mm patch] drivers/media/video/vivi.c: make 2 functions static Adrian Bunk
2006-06-21 21:57 ` [-mm patch] gpio: make two mutexes static again Adrian Bunk
2006-06-21 22:54 ` [-mm patch] drivers/scsi/qla2xxx/: make some functions static Adrian Bunk
2006-06-21 23:20 ` [-mm patch] make drivers/scsi/pata_pcmcia.c:pcmcia_remove_one() static Adrian Bunk
2006-06-22 10:50 ` Alan Cox
2006-06-21 23:37 ` [-mm patch] make drivers/usb/misc/cy7c63.c:vendor_command() static Adrian Bunk
2006-06-21 23:39 ` 2.6.17-mm1 : two PF flags with the same value Peter Williams
2006-06-21 23:44 ` Andrew Morton
2006-06-22 0:12 ` Paul Jackson
2006-06-22 10:03 ` [-mm patch] #if 0 drivers/usb/input/hid-core.c:hid_find_field_by_usage() Adrian Bunk
2006-06-22 10:03 ` [-mm patch] fs/gfs2/: make code static Adrian Bunk
2006-06-22 10:25 ` Steven Whitehouse
2006-06-22 14:58 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-22 15:20 ` 2.6.17-mm1 Mel Gorman
2006-06-22 15:50 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-22 15:54 ` Mel Gorman [this message]
2006-06-22 16:14 ` 2.6.17-mm1 Russell King
2006-06-22 16:50 ` 2.6.17-mm1 Mel Gorman
2006-06-22 17:25 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-23 10:20 ` 2.6.17-mm1 Mel Gorman
2006-06-23 12:22 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-23 12:56 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-23 13:46 ` 2.6.17-mm1 Mel Gorman
2006-06-23 14:52 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-23 15:06 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-23 15:13 ` 2.6.17-mm1 Mel Gorman
2006-06-23 15:51 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-23 16:38 ` 2.6.17-mm1 Mel Gorman
2006-06-26 8:31 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-26 10:37 ` 2.6.17-mm1 Mel Gorman
2006-06-26 11:31 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-26 13:22 ` 2.6.17-mm1 Mel Gorman
2006-06-26 13:49 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-26 14:31 ` 2.6.17-mm1 Mel Gorman
2006-06-26 15:05 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-26 15:15 ` 2.6.17-mm1 Mel Gorman
2006-06-23 15:14 ` 2.6.17-mm1 Franck Bui-Huu
2006-06-23 19:55 ` 2.6.17-mm1 Russell King
2006-06-22 15:52 ` 2.6.17-mm1: kernel/lockdep.c: write-only variables Adrian Bunk
2006-06-23 7:26 ` Ingo Molnar
2006-06-23 7:49 ` Ingo Molnar
2006-06-22 21:34 ` 2.6.17-mm1: UML failing w/o SKAS enabled Theodore Tso
2006-06-22 21:57 ` Andrew Morton
2006-06-23 2:54 ` Jeff Dike
2006-06-23 10:10 ` Roman Zippel
2006-06-23 14:28 ` Jeff Dike
2006-06-26 11:52 ` Roman Zippel
2006-06-29 21:13 ` Jeff Dike
2006-06-23 2:42 ` Jeff Dike
2006-06-23 21:07 ` Theodore Tso
2006-06-23 21:46 ` Jeff Dike
2006-06-24 12:43 ` Theodore Tso
2006-06-24 15:18 ` Jeff Dike
2006-06-24 14:00 ` Theodore Tso
2006-06-24 15:22 ` Jeff Dike
2006-06-24 15:38 ` Theodore Tso
2006-06-24 16:06 ` Thomas Gleixner
2006-06-25 16:08 ` Jeff Dike
2006-06-23 10:55 ` [-mm patch] fs/reiser4/: possible cleanups Adrian Bunk
2006-06-23 15:54 ` Hans Reiser
2006-06-23 10:55 ` [-mm patch] fs/ufs/inode.c: make 2 functions static Adrian Bunk
2006-06-23 10:55 ` [-mm patch] make ipc/sem.c:exit_sem() static Adrian Bunk
2006-06-23 10:55 ` [-mm patch] kernel/lockdep.c: make 3 functions static Adrian Bunk
2006-06-23 11:08 ` Ingo Molnar
2006-06-23 10:55 ` [-mm patch] drivers/char/agp/nvidia-agp.c: remove unused variable Adrian Bunk
2006-06-23 10:55 ` [-mm patch] make kernel/sysctl.c:_proc_do_string() static Adrian Bunk
2006-06-23 10:55 ` [-mm patch] make kernel/utsname.c:clone_uts_ns() Adrian Bunk
2006-06-23 16:35 ` Serge E. Hallyn
2006-06-23 10:56 ` [-mm patch] mm/readahead.c: cleanups Adrian Bunk
2006-06-24 6:00 ` Andrew Morton
2006-06-23 12:33 ` 2.6.17-mm1 Michal Piotrowski
2006-06-23 20:42 ` 2.6.17-mm1 Andrew Morton
2006-06-23 15:48 ` 2.6.17-mm1 Eduard Bloch
2006-06-23 16:42 ` 2.6.17-mm1 Jiri Slaby
2006-06-23 20:39 ` 2.6.17-mm1 Keith Mannthey
2006-06-23 21:32 ` 2.6.17-mm1 Andrew Morton
2006-06-24 21:27 ` 2.6.17-mm1 Sam Ravnborg
2006-06-24 21:53 ` 2.6.17-mm1 Andrew Morton
2006-07-02 18:54 ` 2.6.17-mm1 Tom Rini
2006-06-21 18:19 2.6.17-mm1 Martin Bligh
2006-06-21 18:48 ` 2.6.17-mm1 Mattia Dongili
2006-06-21 19:19 ` 2.6.17-mm1 H. Peter Anvin
2006-06-23 19:23 2.6.17-mm1 Martin Bligh
2006-06-23 21:30 ` 2.6.17-mm1 Andrew Morton
2006-06-26 14:07 ` 2.6.17-mm1 Paulo Marques
2006-06-25 6:03 2.6.17-mm1 Chuck Ebbert
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Pine.LNX.4.64.0606221649070.5869@skynet.skynet.ie \
--to=mel@csn.ul.ie \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=vagabon.xyz@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).