linux-kernel - Re: [PATCH] x86/Kconfig: decrease maximum of X86_RESERVE

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]

Message-ID: <5AFA0407-7F2F-403A-B5BA-7D535993C776@zytor.com>
Date:   Fri, 28 May 2021 13:20:08 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     Mike Rapoport <rppt@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        untaintableangel@...mail.co.uk, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/Kconfig: decrease maximum of X86_RESERVE_LOW to 512K

Please just do it. It is insane to spend more effort on reclaiming at the very most a few hundred kilobytes in this day and age.

On May 28, 2021 7:43:04 AM PDT, Borislav Petkov <bp@...en8.de> wrote:
>On Thu, May 27, 2021 at 07:12:51PM -0700, H. Peter Anvin wrote:
>> BIOSes have been known to clobber more than 64K. They aren't supposed
>to
>> clobber any.
>
>Yah, the BIOSes and what they're not supposed to do. Like they even
>care.
>
>> 640K is the limit because that is the address of the EGA/VGA frame
>> buffer. In the words of Bill Gates "640K ought to be enough for
>anyone."
>
>Right.
>
>So thoughts on:
>
>https://lkml.kernel.org/r/YK%2Bgv0vDfLVD7Sqp@kernel.org
>
>?
>
>Time to do what windoze 7 does?

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.