Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266807AbUIORxP (ORCPT ); Wed, 15 Sep 2004 13:53:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267184AbUIORvc (ORCPT ); Wed, 15 Sep 2004 13:51:32 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:55502 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S266708AbUIORtM (ORCPT ); Wed, 15 Sep 2004 13:49:12 -0400 Subject: Re: 2.6.9 rc2 freezing From: Lee Revell To: Ricky Beam Cc: Jeff Garzik , Zilvinas Valinskas , Erik Tews , linux-kernel mailing list In-Reply-To: References: Content-Type: text/plain Message-Id: <1095270555.2406.154.camel@krustophenia.net> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Wed, 15 Sep 2004 13:49:16 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 926 Lines: 24 On Wed, 2004-09-15 at 12:58, Ricky Beam wrote: > On Wed, 15 Sep 2004, Jeff Garzik wrote: > >Lee Revell wrote: > >> Anyway, if you are running anything on your server that breaks under > >> PREEMPT, it will break anyway as soon as you add another processor. > > > >Incorrect. The spinlock behavior is very different. > > Indeed. Enable PREEMPT (my default for some time now) and the machine > will lockup after spewing pages of scheduling while atomic's. Disable > PREEMPT and the machine is stable again: > Interesting. Still, this looks like a specific bug that needs fixing, it doesn't imply that preemption is a hack. For many workloads preemption is a necessity. Lee - 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/