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

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Message-ID: <YLEBeJwHgnLxRtYW@zn.tnic>
Date:   Fri, 28 May 2021 16:43:04 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     "H. Peter Anvin" <hpa@...or.com>
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

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?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette