From owner-freebsd-hackers Sat May 31 21:20:47 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id VAA04896 for hackers-outgoing; Sat, 31 May 1997 21:20:47 -0700 (PDT) Received: from feephi.phofarm.com (gate.phofarm.com [206.21.77.129]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id VAA04881 for ; Sat, 31 May 1997 21:20:27 -0700 (PDT) Received: from feephi.phofarm.com (feephi.phofarm.com [206.21.77.130]) by feephi.phofarm.com (8.8.5/8.8.5) with SMTP id AAA00634 for ; Sun, 1 Jun 1997 00:17:50 -0400 (EDT) Message-ID: <3390F7E9.41C67EA6@phofarm.com> Date: Sun, 01 Jun 1997 00:17:45 -0400 From: "Danny J. Zerkel" Organization: Photon Farmers X-Mailer: Mozilla 3.01 (X11; I; FreeBSD 2.2-STABLE i386) MIME-Version: 1.0 To: hackers@freebsd.org Subject: Crashing while making world Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk I am running RELENG_2_2 within a day or two. While doing "make libraries", my machine crashed twice, both in the same kernel function, but called from different places. Crash 1: #0 boot (howto=256) at ../../kern/kern_shutdown.c:243 #1 0xf0112412 in panic (fmt=0xf019846f "page fault") at ../../kern/kern_shutdown.c:367 #2 0xf0198fd6 in trap_fatal (frame=0xefbffecc) at ../../i386/i386/trap.c:742 #3 0xf0198ac4 in trap_pfault (frame=0xefbffecc, usermode=0) at ../../i386/i386/trap.c:653 #4 0xf019879f in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = 0, tf_esi = -260185244, tf_ebp = -272630000, tf_isp = -272630028, tf_ebx = 134270976, tf_edx = 0, tf_ecx = 22847488, tf_eax = 32, tf_trapno = 12, tf_err = 0, tf_eip = -266778562, tf_cs = 8, tf_eflags = 66066, tf_esp = -265504772, tf_ss = -2147483648}) at ../../i386/i386/trap.c:311 #5 0xf019483e in pmap_pte_quick (pmap=0xf07de364, va=134270976) at ../../i386/i386/pmap.c:499 #6 0xf0196fb1 in pmap_ts_referenced (pa=22847488) at ../../i386/i386/pmap.c:2881 #7 0xf018d368 in vm_pageout_scan () at ../../vm/vm_pageout.c:794 #8 0xf018d870 in vm_pageout () at ../../vm/vm_pageout.c:1013 #9 0xf01084c6 in kproc_start (udata=0xf01d9040) at ../../kern/init_main.c:240 #10 0xf0108464 in main (framep=0xefbfffb8) at ../../kern/init_main.c:190 Crash 2: #0 boot (howto=256) at ../../kern/kern_shutdown.c:243 #1 0xf0112412 in panic (fmt=0xf019846f "page fault") at ../../kern/kern_shutdown.c:367 #2 0xf0198fd6 in trap_fatal (frame=0xefbffcd0) at ../../i386/i386/trap.c:742 #3 0xf0198ac4 in trap_pfault (frame=0xefbffcd0, usermode=0) at ../../i386/i386/trap.c:653 #4 0xf019879f in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = 4096, tf_esi = -259231644, tf_ebp = -272630508, tf_isp = -272630536, tf_ebx = 3551232, tf_edx = 0, tf_ecx = -266270244, tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip = -266778562, tf_cs = 8, tf_eflags = 66135, tf_esp = -265627400, tf_ss = 64}) at ../../i386/i386/trap.c:311 #5 0xf019483e in pmap_pte_quick (pmap=0xf08c7064, va=3551232) at ../../i386/i386/pmap.c:499 #6 0xf0196d54 in pmap_changebit (pa=22605824, bit=64, setem=0) at ../../i386/i386/pmap.c:2744 #7 0xf0197013 in pmap_clear_modify (pa=22605824) at ../../i386/i386/pmap.c:2915 #8 0xf018c054 in vm_page_set_validclean (m=0xf02690d8, base=0, size=4096) at ../../vm/vm_page.c:1222 #9 0xf012e7d8 in vfs_page_set_valid (bp=0xf26ff352, off=0, m=0xf02690d8) at ../../kern/vfs_bio.c:1839 #10 0xf012e8e6 in vfs_clean_pages (bp=0xf26ff352) at ../../kern/vfs_bio.c:1896 #11 0xf012c82c in bdwrite (bp=0xf26ff352) at ../../kern/vfs_bio.c:437 #12 0xf012fb68 in cluster_write (bp=0xf26ff352, filesize=180224) at ../../kern/vfs_cluster.c:562 #13 0xf017ac14 in ffs_write (ap=0xefbffee8) at ../../ufs/ufs/ufs_readwrite.c:291 #14 0xf01369eb in vn_write (fp=0xf08fff80, uio=0xefbfff34, cred=0xf0744900) at vnode_if.h:283 #15 0xf0119dd3 in write (p=0xf0723e00, uap=0xefbfff94, retval=0xefbfff84) at ../../kern/sys_generic.c:263 #16 0xf019926f in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 1, tf_esi = 602112, tf_ebp = -272639292, tf_isp = -272629788, tf_ebx = 218420, tf_edx = 143920, tf_ecx = 7, tf_eax = 4, tf_trapno = 0, tf_err = 7, tf_eip = 134716593, tf_cs = 31, tf_eflags = 658, tf_esp = -272639320, tf_ss = 39}) at ../../i386/i386/trap.c:890 Line 499 of pmap.c (pmap_pte_quick) is: if (pde = (unsigned) pmap->pm_pdir[va >> PDRSHIFT]) { And in both cases, pmap->pm_pdir is 0x0: $1 = {pm_pdir = 0x0, pm_pteobj = 0xf08f0f80, pm_pvlist = { tqh_first = 0x0, tqh_last = 0xf07de36c}, pm_count = 1, pm_flags = 0, pm_stats = {resident_count = -1, wired_count = 0}, pm_ptphint = 0x0} $1 = {pm_pdir = 0x0, pm_pteobj = 0x0, pm_pvlist = {tqh_first = 0x0, tqh_last = 0x0}, pm_count = 0, pm_flags = 0, pm_stats = { resident_count = 0, wired_count = 98724}, pm_ptphint = 0x0} I tried to trace forward from the calling function's arguments but was unable to find either of these pmap's within the listed pa's. Here is the beginning of my system config: FreeBSD 2.2-STABLE #10: Sat May 31 16:01:03 EDT 1997 root@feephi.phofarm.com:/usr/src/sys/compile/feephi CPU: Pentium (90.74-MHz 586-class CPU) Origin = "GenuineIntel" Id = 0x525 Stepping=5 Features=0x1bf real memory = 33554432 (32768K bytes) avail memory = 30601216 (29884K bytes) Probing for devices on PCI bus 0: chip0 rev 17 on pci0:0 chip1 rev 3 on pci0:2 ... I'm usually pretty good at figuring out how systems got into a panic, but this has me befuddled. Any ideas? Danny J. Zerkel Photon Farmers dzerkel@phofarm.com