From: Dave Hansen <haveblue@us.ibm.com>
To: "Peter W. Morreale" <peter_w_morreale@hotmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Kernel memory limits?
Date: Thu, 17 Mar 2005 10:34:48 -0800 [thread overview]
Message-ID: <1111084488.4945.4.camel@localhost> (raw)
In-Reply-To: <BAY101-F3858D9AE9F3222CAB9AB3CC1490@phx.gbl>
On Thu, 2005-03-17 at 11:06 -0700, Peter W. Morreale wrote:
> (I did not see this addressed in the FAQs...)
>
> How much physical memory can the 2.4.26 kernel address in kernel context on
> x86?
896 MB
There are patches to move this around, though.
> What about DMA memory?
What kind of DMA?
> Local rumor says ~1GB. But this makes little sense given a 32-bit address.
>
> Where in the source can I learn more about this?
arch/i386
include/asm-i386
:)
Check out MAXMEM in include/asm-i386/page.h (at least 2.6)
-- Dave
next prev parent reply other threads:[~2005-03-17 18:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-17 18:06 Kernel memory limits? Peter W. Morreale
2005-03-17 18:34 ` Dave Hansen [this message]
2005-03-17 19:08 ` linux-os
2005-03-17 20:13 ` Coywolf Qi Hunt
2005-03-17 20:51 ` linux-os
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=1111084488.4945.4.camel@localhost \
--to=haveblue@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=peter_w_morreale@hotmail.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 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.