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From: Yuhong Bao <yuhongbao_386@hotmail.com>
Subject: Re: [PATCH] x86/kconfig/32: Make =?utf-8?b?Q09ORklHX1ZNODY=?= default to n and remove EXPERT
Date: Thu, 9 Jul 2015 19:27:25 +0000 (UTC)
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References: <dae7c0f1282a92e5eeac8b9fc389e2a02051d9cb.1436467147.git.luto@kernel.org>
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Andy Lutomirski <luto <at> kernel.org> writes:
> 
> VM86 is entirely broken if ptrace, syscall auditing, or NOHZ_FULL is
> in use.  The code is a big undocumented mess, it's a real PITA to
> test, and it looks like a big chunk of vm86_32.c is dead code.  It
> also plays awful games with the entry asm.

Don't forget that it also depends on the null page being mapped, which is 
why MS disabled it in Win8 by default.

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