From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754694AbWL0RyN (ORCPT ); Wed, 27 Dec 2006 12:54:13 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753635AbWL0RyN (ORCPT ); Wed, 27 Dec 2006 12:54:13 -0500 Received: from homer.mvista.com ([63.81.120.158]:59079 "EHLO gateway-1237.mvista.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754694AbWL0RyN (ORCPT ); Wed, 27 Dec 2006 12:54:13 -0500 Subject: Re: [PATCH -rt] disconnect warp check from hrtimers From: Daniel Walker To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Thomas Gleixner In-Reply-To: <20061227173957.GA18900@elte.hu> References: <20061227172828.998757000@mvista.com> <20061227173957.GA18900@elte.hu> Content-Type: text/plain Date: Wed, 27 Dec 2006 09:53:30 -0800 Message-Id: <1167242010.14081.31.camel@imap.mvista.com> Mime-Version: 1.0 X-Mailer: Evolution 2.6.3 (2.6.3-1.fc5.5) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2006-12-27 at 18:39 +0100, Ingo Molnar wrote: > * Daniel Walker wrote: > > > These calls were getting inconsistent wrt. the xtime_lock. The > > xtime_lock should be held when doing the warp check update, and > > interrupts should be off. > > thanks, applied. Does this solve some warnings that you saw trigger? I saw some unexplained time warping while using the source at this url, http://www.atnf.csiro.au/people/rgooch/benchmarks/linux-scheduler.html it was on an older 2.6.18 based -rt .. The system would print the time warp warning, then hang .. I applied something similar to the patch I just sent, and the time warp warning was gone but the system still hung. New -rt version don't hang, and I don't see the warning .. However, I suspect the time warp warning was a side effect of the hang.. The system hang was resolved by changing the irq threads to all prio 50 .. Daniel