freebsd stable - Aug 2003 - 4.8 crash while swapping heavily

kernel: FreeBSD 4.8-STABLE #0: Mon Aug 25 19:26:01 CDT 2003
compiler: gcc version 2.95.4 20020320 [FreeBSD]
computer:  IBM ThinkPad 600E


Hi:

 I got another crash while running several gui apps. Here is the backtrace; 
any idea what is going wrong?

(kgdb) where
#0  dumpsys () at /usr/src/sys/kern/kern_shutdown.c:487
#1  0xc01abda7 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:316
#2  0xc01ac1e5 in panic (fmt=0xc03623ac "%s") at 
/usr/src/sys/kern/kern_shutdown.c:595
#3  0xc02f5037 in trap_fatal (frame=0xca56bbec, eva=19) at 
/usr/src/sys/i386/i386/trap.c:974
#4  0xc02f4ce5 in trap_pfault (frame=0xca56bbec, usermode=0, eva=19) at 
/usr/src/sys/i386/i386/trap.c:867
#5  0xc02f488b in trap (frame={tf_fs = -1060110320, tf_es = -904331248, tf_ds 
= -899612656, tf_edi = -902809532, tf_esi = 147,
      tf_ebp = -900285388, tf_isp = -900285416, tf_ebx = -902809532, tf_edx = 
-1, tf_ecx = 773869, tf_eax = 32761, tf_trapno = 12,
      tf_err = 0, tf_eip = -1070986656, tf_cs = 8, tf_eflags = 66182, tf_esp = 
-1064484040, tf_ss = -901271876})
    at /usr/src/sys/i386/i386/trap.c:466
#6  0xc02a0a60 in vm_page_lookup (object=0xca303844, pindex=147) at 
/usr/src/sys/vm/vm_page.c:515
#7  0xc029fa02 in vm_object_collapse (object=0xca303844) at 
/usr/src/sys/vm/vm_object.c:1262
#8  0xc029ecc4 in vm_object_deallocate (object=0xc03bcc18) at 
/usr/src/sys/vm/vm_object.c:368
#9  0xc029bff0 in vm_map_entry_delete (map=0xca4be340, entry=0xca555330) at 
/usr/src/sys/vm/vm_map.c:2054
#10 0xc029c1a9 in vm_map_delete (map=0xca4be340, start=0, end=3217031168) at 
/usr/src/sys/vm/vm_map.c:2174
#11 0xc029c236 in vm_map_remove (map=0xca4be340, start=0, end=3217031168) at 
/usr/src/sys/vm/vm_map.c:2199
#12 0xc01a3a97 in exec_new_vmspace (imgp=0xca56be18) at 
/usr/src/sys/kern/kern_exec.c:538
#13 0xc0199933 in exec_elf_imgact (imgp=0xca56be18) at 
/usr/src/sys/kern/imgact_elf.c:507
#14 0xc01a32c0 in execve (p=0xca3af5a0, uap=0xca56bf80) at 
/usr/src/sys/kern/kern_exec.c:208
#15 0xc02f52ed in syscall2 (frame={tf_fs = 168755247, tf_es = 47, tf_ds = 
136839215, tf_edi = 136851080, tf_esi = 32, tf_ebp = -1077943264,
      tf_isp = -900284460, tf_ebx = 694919724, tf_edx = 720, tf_ecx = 
695005952, tf_eax = 59, tf_trapno = 12, tf_err = 2,
      tf_eip = 694598100, tf_cs = 31, tf_eflags = 663, tf_esp = -1077943388, 
tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1175
#16 0xc02e6685 in Xint0x80_syscall ()
Cannot access memory at address 0xbfbfe420.
(kgdb)



							Thanks
							Jonathan

Greetings,

  Think I got that recently too, after cvsup and makeworld/makekernel
  (4.8-STABLE) recently on and around Aug 16.  Before that, last 
  makeworld etc. was in early Apr 2003.

  I do not have a trace, all I see is a kernel panic, and requires a
  hard reboot.

  I was using mfs quite heavily (1/3 of available memory) for this 
  server.  End up I doubled the phyiscal memory (RAM) I have on 
  this server, and so far its  okay for the past 3-4 days. (fingers crossed).

Regards,
/calvin

lines with :> are quotes from Jonathan's email
:> kernel: FreeBSD 4.8-STABLE #0: Mon Aug 25 19:26:01 CDT 2003
:> compiler: gcc version 2.95.4 20020320 [FreeBSD]
:> computer:  IBM ThinkPad 600E
:> 
:> 
:> Hi:
:> 
:>  I got another crash while running several gui apps. Here is the
backtrace;
:> any idea what is going wrong?
:>