From owner-freebsd-smp Mon Apr 17 13:29:27 2000 Delivered-To: freebsd-smp@freebsd.org Received: from megamail.dsl.net (megamail.dsl.net [209.87.64.97]) by hub.freebsd.org (Postfix) with ESMTP id DEEFF37BC5C for ; Mon, 17 Apr 2000 13:29:23 -0700 (PDT) (envelope-from eric@cdc.net) Received: from garfield (216-175-151-207.client.dsl.net [216.175.151.207]) by megamail.dsl.net (8.9.3/8.9.3) with SMTP id PAA06634; Mon, 17 Apr 2000 15:32:35 -0400 From: "Duncan, Eric A." To: , Cc: "Tommy Hallgren" , "Jeremiah Gowdy" , , "Matthew Dillon" Subject: RE: SMP and vn Date: Mon, 17 Apr 2000 14:27:53 -0500 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Importance: Normal In-Reply-To: <20000417211743.A589@relativity.student.utwente.nl> Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I can help test on the following systems (that all have the same issue as stated of hanging on boot): Dell 2450 two P-III 733mhz Dell 2400 two P-III 533mhz Dell 4400 two Xeon 733mhz Eric Duncan eric@cdc.net -----Original Message----- From: owner-freebsd-smp@FreeBSD.ORG [mailto:owner-freebsd-smp@FreeBSD.ORG]On Behalf Of Dave Boers Sent: Monday, April 17, 2000 2:18 PM To: FreeBSD-smp@FreeBSD.org Cc: Tommy Hallgren; Jeremiah Gowdy; bart@ixori.demon.nl; Matthew Dillon Subject: Re: SMP and vn On Mon, Apr 03, 2000 at 11:51:24AM +0200, Dave Boers wrote: > [Ongoing story about 4.0 hangs on SMP systems] I finally found what triggers the hangs we have been talking about. On my system they are triggered by licq and cdrecord. The one thing those applications have in common is that they use Posix scheduling. I have used licq remote and I did not use cdrecord or other applications that use Posix scheduling for the past 15 days and my uptime is also 15 days. That's the longest uptime since a long time for this system! I suspect that the people who have suspected XFree86 of crashing their system had it compiled with support for pthreads... Anyway, as far as I am concerned, the answer is there now: posix scheduling has bugs on smp systems; those bugs were likely introduced in 4.0-current somewhere in december 1999 or january 2000. If anyone wants to look into the problem, I can help testing. From what I know, it looks like the kernel is looping (because there is no panic). Regards, Dave. -- djb@ifa.au.dk d.j.boers@tn.utwente.nl PGP key: ftp://relativity.student.utwente.nl:/pub/pgpkeys/djb.asc To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message