Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933211AbXBWVvn (ORCPT ); Fri, 23 Feb 2007 16:51:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933224AbXBWVvn (ORCPT ); Fri, 23 Feb 2007 16:51:43 -0500 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:48602 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S933211AbXBWVvm (ORCPT ); Fri, 23 Feb 2007 16:51:42 -0500 Date: Fri, 23 Feb 2007 13:45:05 -0800 (PST) Message-Id: <20070223.134505.74749340.davem@davemloft.net> To: linux-kernel@vger.kernel.org Subject: radeon breaks with clocksource_jiffies From: David Miller X-Mailer: Mew version 5.1.52 on Emacs 21.4 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 666 Lines: 14 While probeing PLL information via radeon_get_pllinfo(), it does a "gettimeofday(); do_something(); gettimeofday();" type sequence explicitly with interrupts disabled, so ends up with a zero measurement which then results in a bunch of divisions by zero. We should decide whether gettimeofday() can be expected to advance with interrupts disabled, or that clocksource_jiffies is simply invalid because of this behavior. - 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/