Date: Wed, 25 Aug 1999 08:53:41 +0800 From: Stephen Hocking-Senior Programmer PGS Tensor Perth <shocking@prth.pgs.com> To: current@freebsd.org Subject: New kernel crashes as of yesterday Message-ID: <199908250053.IAA21394@ariadne.tensor.pgs.com>
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After the vm subsystem changes that went in yesterday, I expierence crashes
under heavy load situations (typically when running quake2 in OpenGL mode). A
kernel built on the 23rd works fine. A kernel backtrace follows
# gdb -k kernel.debug /var/crash/vmcore.12
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This GDB was configured as "i386-unknown-freebsd"...
IdlePTD 3088384
initial pcb at 27a000
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x28
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc01647fa
stack pointer = 0x10:0xc58ecdd0
frame pointer = 0x10:0xc58ecddc
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 2 (pagedaemon)
interrupt mask = net bio cam
trap number = 12
panic: page fault
syncing disks... 3 done
dumping to dev (116,1), offset 483456
dump 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40
39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14
13 12 11 10 9 8 7 6 5 4 3 2 1 0
---
#0 boot (howto=256) at ../../kern/kern_shutdown.c:281
281 dumppcb.pcb_cr3 = rcr3();
(kgdb) bt
#0 boot (howto=256) at ../../kern/kern_shutdown.c:281
#1 0xc0131741 in panic (fmt=0xc024cfaf "page fault")
at ../../kern/kern_shutdown.c:529
#2 0xc0210fc6 in trap_fatal (frame=0xc58ecd90, eva=40)
at ../../i386/i386/trap.c:907
#3 0xc0210c79 in trap_pfault (frame=0xc58ecd90, usermode=0, eva=40)
at ../../i386/i386/trap.c:800
#4 0xc02108e7 in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, tf_edi = 1,
tf_esi = 34, tf_ebp = -980496932, tf_isp = -980496964,
tf_ebx = -1044768408, tf_edx = -980496860, tf_ecx = 34, tf_eax = 0,
tf_trapno = 12, tf_err = 0, tf_eip = -1072281606, tf_cs = 8,
tf_eflags = 66195, tf_esp = -1044768408, tf_ss = -1065942592})
at ../../i386/i386/trap.c:426
#5 0xc01647fa in spec_strategy (ap=0xc58ece24)
at ../../miscfs/specfs/spec_vnops.c:549
#6 0xc0163f69 in spec_vnoperate (ap=0xc58ece24)
at ../../miscfs/specfs/spec_vnops.c:124
#7 0xc01cfc9d in ufs_vnoperatespec (ap=0xc58ece24)
at ../../ufs/ufs/ufs_vnops.c:2330
#8 0xc01d10f0 in swap_pager_putpages (object=0xc5fc6dac, m=0xc58eced4,
count=1, sync=0, rtvals=0xc58ece68) at vnode_if.h:891
#9 0xc01cfd07 in default_pager_putpages (object=0xc5fc6dac, m=0xc58eced4,
c=1, sync=0, rtvals=0xc58ece68) at ../../vm/default_pager.c:137
#10 0xc01daf47 in vm_pageout_flush (mc=0xc58eced4, count=1, flags=0)
at ../../vm/vm_pager.h:145
#11 0xc01daea5 in vm_pageout_clean (m=0xc046ea10) at ../../vm/vm_pageout.c:339
#12 0xc01db7d6 in vm_pageout_scan () at ../../vm/vm_pageout.c:917
#13 0xc01dc0a9 in vm_pageout () at ../../vm/vm_pageout.c:1348
#14 0xc0204d40 in fork_trampoline ()
Cannot access memory at address 0xa000.
(kgdb)
--
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