Date: Thu, 30 Apr 1998 00:47:44 -0500 (EST) From: Chael Hall <nowhere@chaos.taylored.com> To: questions@FreeBSD.ORG Cc: Chael Hall <nowhere@chaos.taylored.com> Subject: 2.2.6 panic: vm_page_free... (more info) Message-ID: <Pine.BSF.3.95.980430004433.3624A-100000@chaos.taylored.com>
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Well, the post-mortem analysis seems to have worked, but I don't know what
I'm looking for. I'm not sure if now is the time to become a kernel
hacker, so here's what I turned up so far. I'll be glad to go romping
around some more if you tell me what to type. Alternatively, I'd be
willing to send my kernel and the core file to any unwitting--er, kind
soul who wants to debug it in their spare time. ;-)
Here goes nothing:
Script started on Thu Apr 30 00:39:39 1998
> gdb -k /usr/src/sys/compile/CHAOS226/kernel vmcore.0
GDB is free software and you are welcome to distribute copies of it
under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.16 (i386-unknown-freebsd),
Copyright 1996 Free Software Foundation, Inc...
IdlePTD 253000
current pcb at 22ad28
panic: vm_page_free: freeing free page
#0 0xf0113fa3 in boot ()
(kgdb) where
#0 0xf0113fa3 in boot ()
#1 0xf0114262 in panic ()
#2 0xf01c920f in vm_page_freechk_and_unqueue (m=0xf03ea904)
at ../../vm/vm_page.c:946
#3 0xf01c929e in vm_page_free (m=0xf03ea904) at ../../vm/vm_page.c:1014
#4 0xf01c719a in vm_object_terminate (object=0xf2755000)
at ../../vm/vm_object.c:409
#5 0xf01c6feb in vm_object_deallocate (object=0xf2755000)
at ../../vm/vm_object.c:353
#6 0xf01c5374 in vm_map_entry_delete (map=0xf2336d00, entry=0xf21b7600)
at ../../vm/vm_map.c:1885
#7 0xf01c54f0 in vm_map_delete (map=0xf2336d00, start=0, end=4022329344)
at ../../vm/vm_map.c:1986
#8 0xf01c5580 in vm_map_remove (map=0xf2336d00, start=0, end=4022329344)
at ../../vm/vm_map.c:2011
#9 0xf010db80 in exit1 ()
#10 0xf01154e6 in sigexit ()
#11 0xf01152ca in postsig ()
#12 0xf01dd5f0 in trap (frame={tf_es = -272695257, tf_ds = -272695257,
tf_edi = 0, tf_esi = -272638376, tf_ebp = -272719652,
tf_isp = -272629788, tf_ebx = -272695908, tf_edx = -272702068,
tf_ecx = 1, tf_eax = 4096, tf_trapno = 12, tf_err = 0, tf_eip = 0,
tf_cs = 31, tf_eflags = 66054, tf_esp = -272719712, tf_ss = 39})
---Type <return> to continue, or q <return> to quit---
at ../../i386/i386/trap.c:151
(kgdb) up 2
#2 0xf01c920f in vm_page_freechk_and_unqueue (m=0xf03ea904)
at ../../vm/vm_page.c:946
946 panic("vm_page_free: freeing free page");
(kgdb) up
#3 0xf01c929e in vm_page_free (m=0xf03ea904) at ../../vm/vm_page.c:1014
1014 if (!vm_page_freechk_and_unqueue(m)) {
(kgdb) up
#4 0xf01c719a in vm_object_terminate (object=0xf2755000)
at ../../vm/vm_object.c:409
409 vm_page_free(p);
(kgdb) up
#5 0xf01c6feb in vm_object_deallocate (object=0xf2755000)
at ../../vm/vm_object.c:353
353 vm_object_terminate(object);
(kgdb) up
#6 0xf01c5374 in vm_map_entry_delete (map=0xf2336d00, entry=0xf21b7600)
at ../../vm/vm_map.c:1885
1885 vm_object_deallocate(entry->object.vm_object);
(kgdb) up
#7 0xf01c54f0 in vm_map_delete (map=0xf2336d00, start=0, end=4022329344)
at ../../vm/vm_map.c:1986
1986 vm_map_entry_delete(map, entry);
(kgdb) up
#8 0xf01c5580 in vm_map_remove (map=0xf2336d00, start=0, end=4022329344)
at ../../vm/vm_map.c:2011
2011 result = vm_map_delete(map, start, end);
(kgdb) up
#9 0xf010db80 in exit1 ()
(kgdb) up
#10 0xf01154e6 in sigexit ()
(kgdb) up
#11 0xf01152ca in postsig ()
(kgdb) up
#12 0xf01dd5f0 in trap (frame={tf_es = -272695257, tf_ds = -272695257,
tf_edi = 0, tf_esi = -272638376, tf_ebp = -272719652,
tf_isp = -272629788, tf_ebx = -272695908, tf_edx = -272702068,
tf_ecx = 1, tf_eax = 4096, tf_trapno = 12, tf_err = 0, tf_eip = 0,
tf_cs = 31, tf_eflags = 66054, tf_esp = -272719712, tf_ss = 39})
at ../../i386/i386/trap.c:151
151 postsig(sig);
(kgdb) list
146 u_quad_t oticks;
147 {
148 int sig, s;
149
150 while ((sig = CURSIG(p)) != 0)
151 postsig(sig);
152 p->p_priority = p->p_usrpri;
153 if (want_resched) {
154 /*
155 * Since we are curproc, clock will normally just change
(kgdb) up
Initial frame selected; you cannot go up.
(kgdb) quit
> exit
exit
Script done on Thu Apr 30 00:43:07 1998
Thanks again... I really appreciate any help you can provide.
Once again, I'm not on the questions list, so please make sure that all
replies get to me.
Thanks,
Chael
--
Chael Hall, nowhere@chaos.taylored.com
Gossamer USA - http://gossamer.x-philes.com/
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