From: Daniel Walton <dwalton+mips@ddtsm.com>
To: linux-mips@linux-mips.org
Subject: Re: Using more than 256 MB of memory on SB1250 in 32-bit mode
Date: Thu, 20 May 2004 16:27:04 -0400 [thread overview]
Message-ID: <20040520202703.GA24477@ddtsm.com> (raw)
In-Reply-To: <20030831133434.GA23189@linux-mips.org>
On Sun, Aug 31, 2003 at 03:34:34PM +0200, Ralf Baechle wrote:
> The explanation you gave isn't exactly right. A 2GB/2GB split would normally
> support 2GB of low memory. We don't on MIPS due to the very inconvenient and
> unchangable mappings of KSEG0/KSEG1 - something that may have been sweet
> in '85 when the address map was designed but not today when 32-bit address
> spaces are beginning to be fairly tight.
>
> Highmem works ok in 2.4 as long as you have a reasonably low ratio of
> highmem to lowmem. For typical loads that means going beyond 4:1 isn't
> sensible but the actual number may vary much based on exact system
> configuration or workload.
>
> Ralf
>
So what is a practical limit to total memory.
Daniel
next prev parent reply other threads:[~2004-05-20 20:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-29 21:59 Using more than 256 MB of memory on SB1250 in 32-bit mode Steve Madsen
2003-08-31 13:34 ` Ralf Baechle
2004-05-20 20:27 ` Daniel Walton [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-08-30 2:40 Finney, Steve
2003-08-30 2:40 ` Finney, Steve
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=20040520202703.GA24477@ddtsm.com \
--to=dwalton+mips@ddtsm.com \
--cc=linux-mips@linux-mips.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.