linux-kernel - Re: [PATCH 0/4] jump label patches

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Message-Id: <1254838148.13160.224.camel@gandalf.stny.rr.com>
Date:	Tue, 06 Oct 2009 10:09:08 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Roland McGrath <roland@...hat.com>
Cc:	Jason Baron <jbaron@...hat.com>, linux-kernel@...r.kernel.org,
	mingo@...e.hu, mathieu.desnoyers@...ymtl.ca, tglx@...utronix.de,
	ak@...e.de, rth@...hat.com, mhiramat@...hat.com
Subject: Re: [PATCH 0/4] jump label patches

On Mon, 2009-10-05 at 23:04 -0700, Roland McGrath wrote:
> I think text_poke_fixup() is a good safe place to start, and it seems wise
> to merge a version using that before worrying anything subtler.  But it's
> almost surely overkill and makes the enable/disable switching cost pretty
> huge.  The rules as documented by Intel seem to indicate that simple
> self-modification can work for UP and for SMP there should be some scheme
> with IPIs that is not too terrible.  
> 

I think this is still under discussion. The thread about immediates
seems to express some concern.

  http://lkml.org/lkml/2009/9/24/134

-- Steve


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