From owner-freebsd-bugs Tue Aug 21 0:50: 9 2001 Delivered-To: freebsd-bugs@hub.freebsd.org Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by hub.freebsd.org (Postfix) with ESMTP id 27ACE37B40A for ; Tue, 21 Aug 2001 00:50:02 -0700 (PDT) (envelope-from gnats@FreeBSD.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.11.4/8.11.4) id f7L7o2068935; Tue, 21 Aug 2001 00:50:02 -0700 (PDT) (envelope-from gnats) Date: Tue, 21 Aug 2001 00:50:02 -0700 (PDT) Message-Id: <200108210750.f7L7o2068935@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org Cc: From: Andre Albsmeier Subject: Re: kern/29845: 4.4-PRERELEASE crashes under heavy net I/O Reply-To: Andre Albsmeier Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org The following reply was made to PR kern/29845; it has been noted by GNATS. From: Andre Albsmeier To: David Malone Cc: Andre Albsmeier , FreeBSD-gnats-submit@freebsd.org, Ian Dowse Subject: Re: kern/29845: 4.4-PRERELEASE crashes under heavy net I/O Date: Tue, 21 Aug 2001 09:43:14 +0200 On Sat, 18-Aug-2001 at 14:49:23 +0100, David Malone wrote: > On Sat, Aug 18, 2001 at 01:33:22PM +0200, Andre Albsmeier wrote: > > I have saved the crashdumps for further examination. As you can see, > > the box crashes in whichever process it wants... > > I'd guess that something is freeing an mbuf while it is still in > use. This would result in either a panic when the mbuf is corrupted > while in use or a double freeing of the mbuf. This could plausable > explain the panics you included trace backs for. > > I think Ian Dowse has some tools for examining the mbuf free lists > in kernel dumps. He did also have some patches for catching writes > to shared or free mbuf clusters, which might help figure out what's > going on here. > > The only thing that doesn't tally is that this is only effecting > your laptop and not all your machines. OK, I have some news here: 1.) I put the harddisk into another machine of the same type (Siemens Mobile 510 AGP). Same bad effects here. So we can be quite sure it is no problem with RAM/CPU ... 2.) I tried the newest 4.4-RC1. Same problems. Now it comes: 3.) I put the box into a docking station which got an Intel Etherexpress PRO 100 sitting on the PCI bus. Now I can stress the machine as much as I want... no problems. As soon as I go back using the pccard stuff for networking my problems are back. It really seems to be somehow pccard related... -Andre To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message