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 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
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