From owner-freebsd-current Mon May 20 23:01:18 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id XAA29814 for current-outgoing; Mon, 20 May 1996 23:01:18 -0700 (PDT) Received: from bunyip.cc.uq.oz.au (pp@bunyip.cc.uq.oz.au [130.102.2.1]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id XAA29805 for ; Mon, 20 May 1996 23:01:13 -0700 (PDT) Received: from bunyip.cc.uq.oz.au by bunyip.cc.uq.oz.au id <07979-0@bunyip.cc.uq.oz.au>; Tue, 21 May 1996 16:00:23 +1000 Received: from netfl15a.devetir.qld.gov.au by pandora.devetir.qld.gov.au (8.6.10/DEVETIR-E0.3a) with ESMTP id PAA07317; Tue, 21 May 1996 15:20:19 +1000 Received: from localhost by netfl15a.devetir.qld.gov.au (8.6.8.1/DEVETIR-0.1) id FAA21386; Tue, 21 May 1996 05:20:43 GMT Message-Id: <199605210520.FAA21386@netfl15a.devetir.qld.gov.au> X-Mailer: exmh version 1.6.5 12/11/95 To: "John S. Dyson" cc: current@freebsd.org Subject: Re: Possible problem with new VM code? In-reply-to: Your message of "Mon, 20 May 1996 18:53:01 EST." <199605202353.SAA01994@dyson.iquest.net> X-Face: 3}heU+2?b->-GSF-G4T4>jEB9~FR(V9lo&o>kAy=Pj&;oVOc<|pr%I/VSG"ZD32J>5gGC0N 7gj]^GI@M:LlqNd]|(2OxOxy@$6@/!,";-!OlucF^=jq8s57$%qXd/ieC8DhWmIy@J1AcnvSGV\|*! >Bvu7+0h4zCY^]{AxXKsDTlgA2m]fX$W@'8ev-Qi+-;%L'CcZ'NBL!@n?}q!M&Em3*eW7,093nOeV8 M)(u+6D;%B7j\XA/9j4!Gj~&jYzflG[#)E9sI&Xe9~y~Gn%fA7>F:YKr"Wx4cZU*6{^2ocZ!YyR Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 21 May 1996 15:20:42 +1000 From: Stephen Hocking Sender: owner-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk I actually managed to provoke a crash with DDB at the ready while the system was under heavy load! This is on different hardware (486/66, 16Mb with IDE, the old one was 486/66, 8Mb, 1542B + barracuda) & without the suggested alteration of splvm to be the same as splhigh) Mind you, it took two make worlds & running the quake binary to do it. The backtrace is as follows (note I've compiled the kernel with -O2 -m486) - panic: vm_page_activate: already active _vm_page_activate(f02291d0,660000,7fffffff,f01cfc80,208000) at _vm_page_activate+0x34 _vm_pageout_scan((f0bc1b0,9d7,7fffffff,1,80000000) at _vm_pageout_scan+0x1b3 _vm_pageout(f09090cf,f01794a9,f01bce4,efbfffac,f0106d31) at _vm_pageout+0x202 _kproc_start(f01bc1b0,204f00, 208000,0,1) at _kproc_start+0x35 main(with usual args) I'll try the suggested alteration of VM SPL levels. Stephen -- The views expressed above are not those of the Worker's Compensation Board of Queensland, Australia.