From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 21 Jun 2001 19:18:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 21 Jun 2001 19:18:23 -0400 Received: from juicer02.bigpond.com ([139.134.6.78]:44242 "EHLO mailin5.bigpond.com") by vger.kernel.org with ESMTP id ; Thu, 21 Jun 2001 19:18:11 -0400 Message-Id: From: Rusty Russell To: Alexander Viro Cc: "linux-kernel@vger.kernel.org" Subject: Re: Alan Cox quote? (was: Re: accounting for threads) In-Reply-To: Your message of "Wed, 20 Jun 2001 14:35:25 EDT." Date: Thu, 21 Jun 2001 14:11:17 +1000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org In message you wri te: > In practice it's a BS. There is a lot of ways minor modifications of code > could add a preemption point, so if you rely on the lack of such - expect > major PITA. > > Yes, in theory SMP adds some extra fun. Practically, almost every "SMP" > race found so far did not require SMP. Disagree. A significant percentage of the netfilter bugs have been SMP only (the whole thing is non-reentrant on UP). Depends what part of the kernel you play in, Rusty. -- Premature optmztion is rt of all evl. --DK