Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755923AbZA2SpW (ORCPT ); Thu, 29 Jan 2009 13:45:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751358AbZA2SpE (ORCPT ); Thu, 29 Jan 2009 13:45:04 -0500 Received: from casper.infradead.org ([85.118.1.10]:55560 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751323AbZA2SpC (ORCPT ); Thu, 29 Jan 2009 13:45:02 -0500 Subject: Re: [PATCH -v2] use per cpu data for single cpu ipi calls From: Peter Zijlstra To: Linus Torvalds Cc: Steven Rostedt , Andrew Morton , LKML , Rusty Russell , npiggin@suse.de, Ingo Molnar , Thomas Gleixner , Arjan van de Ven , jens.axboe@oracle.com In-Reply-To: References: <200901290955.38940.rusty@rustcorp.com.au> <20090128173039.cbc29e81.akpm@linux-foundation.org> <1233218954.7835.11.camel@twins> <1233253380.4495.123.camel@laptop> Content-Type: text/plain Date: Thu, 29 Jan 2009 19:44:40 +0100 Message-Id: <1233254680.4495.126.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.24.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 658 Lines: 17 On Thu, 2009-01-29 at 10:39 -0800, Linus Torvalds wrote: > But you're right, I'm still not seeing anything that looks _likely_ to be > a problem. But I worry that it's something somebody may want to do. Well, the kgdb case I looked at did exactly that, and that is a problem. As for people wanting to do it, we have __smp_call_function_single() to do just that, all you have to do is provide your own csd. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/