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Subject: Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll()
From: Arjan van de Ven <arjan@infradead.org>
To: Hiro Yoshioka <hyoshiok@miraclelinux.com>
Cc: taka@valinux.co.jp, lkml.hyoshiok@gmail.com, linux-kernel@vger.kernel.org
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Date: Tue, 16 Aug 2005 12:25:50 +0200
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On Tue, 2005-08-16 at 19:16 +0900, Hiro Yoshioka wrote:
> From: Arjan van de Ven <arjan@infradead.org>
> > > My code does nothing do it.
> > > 
> > > I need a volunteer to implement it.
> > 
> > it's actually not too hard; all you need is to use SSE and not MMX; and
> > then just store sse register you're overwriting on the stack or so...
> 
> oh, really? Does the linux kernel take care of
> SSE save/restore on a task switch?

not on kernel entry afaik.
However just save the register on the stack and put it back at the
end...