Re: [PATCH v2] x86: Preserve iopl on fork and execve

From: Arjan van de Ven
Date: Tue May 12 2015 - 11:26:29 EST

> also the interesting question is:
> can a process give up these perms?
> otherwise it becomes a "once given, never gotten rid of" hell hole.

If you look at a modern linux distro, nothing should need/use iopl and
co anymore, so maybe an interesting
question is if we can stick these behind a CONFIG_ option (default on
of course for compatibility)... just like
some of the /dev/mem like things are now hidable for folks who know
they don't need them.
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