linux-kernel - Re: [RFC PATCH] x86, fpu: Use eagerfpu by default on all CPUs

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Message-ID: <20150225103701.GA3226@pd.tnic>
Date:	Wed, 25 Feb 2015 11:37:01 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Denys Vlasenko <vda.linux@...glemail.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Rik van Riel <riel@...hat.com>, X86 ML <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] x86, fpu: Use eagerfpu by default on all CPUs

On Tue, Feb 24, 2015 at 04:07:07PM -0800, Andy Lutomirski wrote:
> I'd prefer a different partial solution: encourage everyone to clear
> the xstate before making syscalls (using e.g. vzeroall).  In fact,
> maybe user code should aggressively clear newly-unused xstate.

We don't trust userspace.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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