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Date: Sat, 13 Aug 2011 20:32:52 +0400
From: Vasiliy Kulikov <>
To: "H. Peter Anvin" <>
Cc: Thomas Gleixner <>, Ingo Molnar <>,
	James Morris <>,,,,
Subject: Re: Re: [RFC] x86: restrict pid namespaces to
 32 or 64 bit syscalls

On Sat, Aug 13, 2011 at 10:41 -0500, H. Peter Anvin wrote:
> IA64 is totally different.

I didn't say all IA-32 compatibility layer of x86 is a crap, surely no.
But there is some code, which is poorly tested exactly because it is
compatibility code.  One relatively recent example:;a=commitdiff;h=3e645d6b485446c54c6745c5e2cf5c528fe4deec

>  I'm extremely sceptical to this patch;
> it feels like putting code in a super-hot path to paper over a problem that has to be fixed anyway.

I'll move the check to the tracesys branch, which is not a hot path, in
the next RFC version, so this should not be a problem.


Vasiliy Kulikov - bringing security into open computing environments

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