From owner-freebsd-stable@FreeBSD.ORG Fri Jan 20 02:37:38 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AACF31065670 for ; Fri, 20 Jan 2012 02:37:38 +0000 (UTC) (envelope-from freebsd@damnhippie.dyndns.org) Received: from qmta04.emeryville.ca.mail.comcast.net (qmta04.emeryville.ca.mail.comcast.net [76.96.30.40]) by mx1.freebsd.org (Postfix) with ESMTP id 891608FC12 for ; Fri, 20 Jan 2012 02:37:38 +0000 (UTC) Received: from omta21.emeryville.ca.mail.comcast.net ([76.96.30.88]) by qmta04.emeryville.ca.mail.comcast.net with comcast id PeTj1i0011u4NiLA4edeXk; Fri, 20 Jan 2012 02:37:38 +0000 Received: from damnhippie.dyndns.org ([24.8.232.202]) by omta21.emeryville.ca.mail.comcast.net with comcast id Pedc1i00P4NgCEG8heddFW; Fri, 20 Jan 2012 02:37:37 +0000 Received: from [172.22.42.240] (revolution.hippie.lan [172.22.42.240]) by damnhippie.dyndns.org (8.14.3/8.14.3) with ESMTP id q0K2bZLn007815; Thu, 19 Jan 2012 19:37:35 -0700 (MST) (envelope-from freebsd@damnhippie.dyndns.org) From: Ian Lepore To: Alexander Motin In-Reply-To: <4F187310.7020806@FreeBSD.org> References: <4F181FE7.30904@karolyi.hu> <4F182516.3020506@gmail.com> <4F182FB3.7050405@karolyi.hu> <4F183008.9040603@karolyi.hu> <4F1835ED.3050609@karolyi.hu> <4F1836E1.1080105@karolyi.hu> <4F1848BF.2050900@karolyi.hu> <4F184F8F.4040708@FreeBSD.org> <1326999941.21604.63.camel@revolution.hippie.lan> <4F187310.7020806@FreeBSD.org> Content-Type: text/plain Date: Thu, 19 Jan 2012 19:37:35 -0700 Message-Id: <1327027055.1663.6.camel@revolution.hippie.lan> Mime-Version: 1.0 X-Mailer: Evolution 2.26.0 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit Cc: freebsd-stable@FreeBSD.org Subject: Re: Strange 'hangs' with RELENG_9 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Jan 2012 02:37:38 -0000 On Thu, 2012-01-19 at 21:46 +0200, Alexander Motin wrote: > On 01/19/12 21:05, Ian Lepore wrote: > > I saw in the eventtimers(7) manpage that there's a sysctl to change the > > timer, but when I used it the system timing went completely wonky (ntpd > > reported it was off by many seconds, a few seconds after I changed it). > > When I just tried it again the system locked up and had to be power > > cycled. (I'm trying this on old hardware where my only choices are > > i8254 and RTC, and changing to RTC apparently doesn't work well.) So I > > didn't want to recommend it to someone else. :) > > That's strange. On all systems I have, I can safely set any event timer > in any way. Though for better precision it is better to set them using > loader tunable. As it turns out, this isn't a problem with eventtimers in any way, sorry for the confusion. I had checked out and built a completely clean RELENG_9_0_0_RELEASE so that I could be sure I was testing against the offical release before telling the OP "I do/don't see similar problems." As it turns out, one of my local hacks is required if I want use the RTC clock for anything (buggy old hardware). Once I applied that patch, I can now switch eventtimers without any problems. -- Ian