Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754478AbYGSKYJ (ORCPT ); Sat, 19 Jul 2008 06:24:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752833AbYGSKXK (ORCPT ); Sat, 19 Jul 2008 06:23:10 -0400 Received: from smtp-out01.alice-dsl.net ([88.44.60.11]:23975 "EHLO smtp-out01.alice-dsl.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752937AbYGSKXI (ORCPT ); Sat, 19 Jul 2008 06:23:08 -0400 To: Arjan van de Ven Cc: Simon Arlott , linux-kernel@vger.kernel.org, dwalker@mvista.com Subject: Re: [patch 0/3] fastboot patches series 1 From: Andi Kleen References: <20080718151524.5ef9e29b@infradead.org> <488172E0.6050502@simon.arlott.org.uk> <20080718221630.2809abbd@infradead.org> Date: Sat, 19 Jul 2008 12:22:43 +0200 In-Reply-To: <20080718221630.2809abbd@infradead.org> (Arjan van de Ven's message of "Fri, 18 Jul 2008 22:16:30 -0700") Message-ID: <87tzem8970.fsf@basil.nowhere.org> User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 19 Jul 2008 10:22:41.0051 (UTC) FILETIME=[6000B6B0:01C8E989] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 899 Lines: 21 Arjan van de Ven writes: > > One possible theory is that we now run on both cpus and if they're out > of sync timewise, things like delays suddenly are shorter than expected > if time jumps around.... On systems with non synchronized TSC the clocksource watchdog tends to disable the TSC time source only quite late in boot (on my systems typically even after kernel boot). So yes this could be a problem. However he has a AMD QC system where the TSCs are synchronized on the hardware level and there's also no message from the watchdog disabling TSC, so this isn't the problem causing this issue. Must be something else. -Andi -- 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/