From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932705AbZJFOLJ (ORCPT ); Tue, 6 Oct 2009 10:11:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932685AbZJFOLI (ORCPT ); Tue, 6 Oct 2009 10:11:08 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.125]:51343 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932639AbZJFOLH (ORCPT ); Tue, 6 Oct 2009 10:11:07 -0400 Subject: Re: [PATCH 0/4] jump label patches From: Steven Rostedt Reply-To: rostedt@goodmis.org To: Roland McGrath Cc: Jason Baron , linux-kernel@vger.kernel.org, mingo@elte.hu, mathieu.desnoyers@polymtl.ca, tglx@linutronix.de, ak@suse.de, rth@redhat.com, mhiramat@redhat.com In-Reply-To: <20091006060410.CAF2528@magilla.sf.frob.com> References: <20091006060410.CAF2528@magilla.sf.frob.com> Content-Type: text/plain Organization: Kihon Technologies Inc. Date: Tue, 06 Oct 2009 10:09:08 -0400 Message-Id: <1254838148.13160.224.camel@gandalf.stny.rr.com> Mime-Version: 1.0 X-Mailer: Evolution 2.26.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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