linux-kernel - Re: memory remapping, 4gb memory on 945gt

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 04 Jan 2008 17:22:57 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	felix-linuxkernel@...e.de
Cc:	linux-kernel@...r.kernel.org
Subject: Re: memory remapping, 4gb memory on 945gt

felix-linuxkernel@...e.de writes:

> I recently put 4 GB of memory in my Acer Travelmate 8210 series
> notebook.  The BIOS only detects 3 GB.

Actually it will detect 4GB, but put the PCI hole over the last GB.
One way to get more usable memory is to configure the BIOS to use a smaller
PCI hole (e.g. use smaller frame buffer/aperture etc.)

> I googled around a little.  It appears to be a chipset limitation of the
> 945gt, which uses the fourth gig for devices.
>
> Now I can understand this explanation for 32-bit mode, but I'm running
> in 64-bit mode.  There should be a way to use the fourth gig under
> Linux.  Is there?

The chipset limitation applies to 64bit mode as well as to 32bit mode
(which actually does not have a 4GB limitation with PAE)

-Andi
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/