From: Jens Axboe <axboe@suse.de>
To: "Barry K. Nathan" <barryn@pobox.com>
Cc: Steve Snyder <swsnyder@insightbb.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: HIGHMEM4G config for 1GB RAM on desktop?
Date: Tue, 3 Aug 2004 15:30:35 +0200 [thread overview]
Message-ID: <20040803133034.GM23504@suse.de> (raw)
In-Reply-To: <20040802220521.GA2179@ip68-4-98-123.oc.oc.cox.net>
On Mon, Aug 02 2004, Barry K. Nathan wrote:
> On Mon, Aug 02, 2004 at 04:02:34PM -0500, Steve Snyder wrote:
> > There seems to be a controversy about the use of the CONFIG_HIGHMEM4G
> > kernel configuration. After reading many posts on the subject, I still
> > don't know which setting is best for me.
>
> On my own desktop system with 1GB RAM, any highmem slowdown seems to be
> outweighed by the fact that more disk data stays cached in RAM (so I hit
> the disk much less often).
There's also the option of moving the mapping only slightly, so that all
of the 1G fits in low memory. That's the best option for 1G desktop
machines, imho. Changing PAGE_OFFSET from 0xc0000000 to 0xb0000000 would
probably be enough.
Then you can have your cake and eat it too.
--
Jens Axboe
next prev parent reply other threads:[~2004-08-03 13:31 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-02 21:02 HIGHMEM4G config for 1GB RAM on desktop? Steve Snyder
2004-08-02 21:32 ` Bart Alewijnse
2004-08-02 22:05 ` Barry K. Nathan
2004-08-03 13:30 ` Jens Axboe [this message]
2004-08-03 14:13 ` Prakash K. Cheemplavam
2004-08-03 14:29 ` Con Kolivas
2004-08-04 6:06 ` Jens Axboe
2004-08-04 11:14 ` Eric Bambach
2004-08-04 13:07 ` Jens Axboe
2004-08-04 19:06 ` Andrew Morton
2004-08-04 19:21 ` Marc-Christian Petersen
2004-08-04 19:30 ` Martin J. Bligh
2004-08-04 19:51 ` Andrew Morton
2004-08-04 20:09 ` Martin J. Bligh
2004-08-04 20:09 ` Roland Dreier
2004-08-04 20:13 ` Martin J. Bligh
2004-08-12 0:53 ` Timothy Miller
2004-08-30 18:06 ` Timothy Miller
2004-08-30 17:49 ` Miquel van Smoorenburg
2004-08-31 22:46 ` Timothy Miller
2004-09-01 7:52 ` Miquel van Smoorenburg
2004-09-01 9:38 ` Matt Heler
[not found] ` <1094030083l.3189l.2l@traveler>
[not found] ` <1094030194l.3189l.3l@traveler>
[not found] ` <200409010233.31643.lkml@lpbproductions.com>
2004-09-01 9:58 ` 3ware queue depth [was: Re: HIGHMEM4G config for 1GB RAM on desktop?] Miquel van Smoorenburg
2004-09-01 10:09 ` Christoph Hellwig
2004-09-01 11:08 ` Miquel van Smoorenburg
2004-09-01 11:43 ` Christoph Hellwig
2004-09-01 19:43 ` Patrick Mansfield
2004-09-01 22:23 ` Miquel van Smoorenburg
2004-09-04 10:10 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2004-08-06 12:52 HIGHMEM4G config for 1GB RAM on desktop? linux
2004-08-07 0:20 ` Valdis.Kletnieks
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