linux-kernel - Re: mtrr registers with >= 4GB ram

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] [day] [month] [year] [list]

Date:	Wed, 2 Jul 2008 09:49:14 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	rb6@...e.edu
Cc:	linux-kernel@...r.kernel.org
Subject: Re: mtrr registers with >= 4GB ram

On Wed, Jul 2, 2008 at 7:55 AM, Rann Bar-On <rb6@...e.edu> wrote:
> As documented at https://bugs.launchpad.net/linux/+bug/210780 and
> http://www.rage3d.com/board/showthread.php?t=33821469 (as well as other
> places - google 4gb mtrr bug), the kernel appears to misdetect the mtrr
> registers on many machines with 4gb ram, causing all sorts of issues -
> especially with video drivers in X.  It is possible to rewrite the correct
> registers using a pretty hackish script, but the bug should probably be
> fixed at the kernel level.
>
> Please CC me personally when replying, as I'm not on LKML.  I'd be happy to
> try out patches if such come along :)

please try tip/master
http://people.redhat.com/mingo/tip.git/readme.txt

we have some patches there ...
      x86: mtrr cleanup for converting continuous to discrete layout, v8
      x86: mtrr cleanup for converting continuous to discrete layout v8 - fix
      x86: mtrr cleanup for converting continuous to discrete - auto detect v4
      x86: mtrr cleanup for converting continuous to discrete layout - fix #2

YH
--
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/