linux-kernel - Re: stop breaking dosemu (Re: x86/kconfig/32: Rename CONFIG

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Message-ID: <55EA1F4E.9090403@gmail.com>
Date:	Fri, 4 Sep 2015 15:46:38 -0700
From:	Raymond Jennings <shentino@...il.com>
To:	Stas Sergeev <stsp@...t.ru>,
	Austin S Hemmelgarn <ahferroin7@...il.com>
Cc:	Chuck Ebbert <cebbert.lkml@...il.com>,
	Andy Lutomirski <luto@...capital.net>,
	Josh Boyer <jwboyer@...oraproject.org>,
	linux-kernel@...r.kernel.org,
	"Andrew Bird (Sphere Systems)" <ajb@...eresystems.co.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Kees Cook <keescook@...omium.org>,
	Brian Gerst <brgerst@...il.com>
Subject: Re: stop breaking dosemu (Re: x86/kconfig/32: Rename CONFIG_VM86 and
 default it to 'n')

On 09/04/15 14:30, Stas Sergeev wrote:
> 05.09.2015 00:16, Stas Sergeev пишет:
>> I agree. vm86() is a mess.
>> My point is that its risky parts and useless funtionality
>> is _already_ known (even I can point to the particular code
>> parts than can simply be removed). As such, it simply had
>> to be re-visited and cleaned up to match at least 1 and 3
>> (and then maybe 5). This wasn't done, and the knob was
>> introduced _instead_ of doing this.
> Grr, I mean it was disabled by default instead of doing this,
> and the knob was only proposed, not added.

You can't just pull vm86 out of the kernel anyway.  dosemu is a 
userspace application that depends on it, so pulling this feature out 
would be a big fat regression, period.

I would personally rather not hear about how "it's a legacy program so 
its userbase is shrinking" used as any sort of excuse to ignore the fact 
that we shouldn't break userspace.

I can even say as a user that vm86 is important to me.

By all means, cleaning up vm86 is a good idea.  But removing it or 
fencing it off with a strong deprecation doesn't sound like the right idea.
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