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SubjectPROBLEM: kernel v2.4.18, faulty virtual mem code?
Hi there,

I got a small problem while running a game under X11.
It looks to me that there is a problem in the virtual
memory code.
My machine doesn't crash, it just dumps a kernel stack
to the console.

This behaviour is not really critical, but it is not nice!

kernel version is:

----------------------------------------------------------------
Linux version 2.4.18 (root@t28a301) (gcc version 2.95.3 20010315
(release)) #1 Sam Mär 16 12:07:18 CET 2002
----------------------------------------------------------------

ksymoops output:

----------------------------------------------------------------
ksymoops 0.7c on i686 2.4.18. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.18/ (default)
-m /boot/System.map (specified)

Reading Oops report from the terminal
invalid operand: 0000
CPU: 0
EIP: 0010:[<c012d058>] Tainted: P
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010282
eax: c125535c ebx: c1190e00 ecx: c1190e00 edx: c0242f20
esi: c1190e00 edi: 00000000 ebp: 000001ff esp: c142ff28
ds: 0018 es: 0018 ss: 0018
Process kswapd (pid: 5, stackpage=c142f000)
Stack: cb4f7f40 c1190e00 00000018 000001ff c1190e00 000001d0 cb4f7f40 c1190e00
c012c962 c012d74b c012c99b 00000020 000001d0 00000020 00000006 00000006
c142e000 00001d1f 000001d0 c0243048 c012cba6 00000006 00000004 00000006
Call Trace: [<c012c962>] [<c012d74b>] [<c012c99b>] [<c012cba6>] [<c012cc0c>]
[<c012cca3>] [<c012cd06>] [<c012ce1d>] [<c0105708>]
Code: 0f 0b 89 d8 2b 05 2c cd 29 c0 c1 f8 06 3b 05 20 cd 29 c0 72

>>EIP; c012d058 <__free_pages_ok+28/200> <=====
Trace; c012c962 <shrink_cache+1d2/2f0>
Trace; c012d74b <__free_pages+1b/20>
Trace; c012c99b <shrink_cache+20b/2f0>
Trace; c012cba6 <shrink_caches+56/80>
Trace; c012cc0c <try_to_free_pages+3c/60>
Trace; c012cca3 <kswapd_balance_pgdat+43/90>
Trace; c012cd06 <kswapd_balance+16/30>
Trace; c012ce1d <kswapd+9d/c0>
Trace; c0105708 <kernel_thread+28/40>
Code; c012d058 <__free_pages_ok+28/200>
00000000 <_EIP>:
Code; c012d058 <__free_pages_ok+28/200> <=====
0: 0f 0b ud2a <=====
Code; c012d05a <__free_pages_ok+2a/200>
2: 89 d8 mov %ebx,%eax
Code; c012d05c <__free_pages_ok+2c/200>
4: 2b 05 2c cd 29 c0 sub 0xc029cd2c,%eax
Code; c012d062 <__free_pages_ok+32/200>
a: c1 f8 06 sar $0x6,%eax
Code; c012d065 <__free_pages_ok+35/200>
d: 3b 05 20 cd 29 c0 cmp 0xc029cd20,%eax
Code; c012d06b <__free_pages_ok+3b/200>
13: 72 00 jb 15 <_EIP+0x15> c012d06d <__free_pages_ok+3d/200>

invalid operand: 0000
CPU: 0
EIP: 0010:[<c012d058>] Tainted: P
EFLAGS: 00010286
eax: c1160c9c ebx: c1167540 ecx: c1167540 edx: cd759430
esi: c1167540 edi: 00000000 ebp: 00000200 esp: cfcc7dcc
ds: 0018 es: 0018 ss: 0018
Process game.x86 (pid: 30557, stackpage=cfcc7000)
Stack: cfb2b1c0 c1167540 0000001f 00000200 c1167540 000001d2 cfb2b1c0 c1167540
c012c962 c012d74b c012c99b 00000020 000001d2 00000020 00000006 00000006
cfcc6000 00001d84 000001d2 c0243048 c012cba6 00000006 00000004 00000006
Call Trace: [<c012c962>] [<c012d74b>] [<c012c99b>] [<c012cba6>] [<c012cc0c>]
[<c012d44e>] [<c012d67c>] [<c0207f06>] [<c012d3f6>] [<c0124a60>] [<c0124aff>]
[<c0124c32>] [<c01144f3>] [<c0114390>] [<c010bc9d>] [<c0106f6c>]
Code: 0f 0b 89 d8 2b 05 2c cd 29 c0 c1 f8 06 3b 05 20 cd 29 c0 72

>>EIP; c012d058 <__free_pages_ok+28/200> <=====
Trace; c012c962 <shrink_cache+1d2/2f0>
Trace; c012d74b <__free_pages+1b/20>
Trace; c012c99b <shrink_cache+20b/2f0>
Trace; c012cba6 <shrink_caches+56/80>
Trace; c012cc0c <try_to_free_pages+3c/60>
Trace; c012d44e <balance_classzone+4e/170>
Trace; c012d67c <__alloc_pages+10c/170>
Trace; c0207f06 <mmx_clear_page+26/30>
Trace; c012d3f6 <_alloc_pages+16/20>
Trace; c0124a60 <do_anonymous_page+30/a0>
Trace; c0124aff <do_no_page+2f/110>
Trace; c0124c32 <handle_mm_fault+52/b0>
Trace; c01144f3 <do_page_fault+163/494>
Trace; c0114390 <do_page_fault+0/494>
Trace; c010bc9d <old_mmap+ed/130>
Trace; c0106f6c <error_code+34/3c>
Code; c012d058 <__free_pages_ok+28/200>
00000000 <_EIP>:
Code; c012d058 <__free_pages_ok+28/200> <=====
0: 0f 0b ud2a <=====
Code; c012d05a <__free_pages_ok+2a/200>
2: 89 d8 mov %ebx,%eax
Code; c012d05c <__free_pages_ok+2c/200>
4: 2b 05 2c cd 29 c0 sub 0xc029cd2c,%eax
Code; c012d062 <__free_pages_ok+32/200>
a: c1 f8 06 sar $0x6,%eax
Code; c012d065 <__free_pages_ok+35/200>
d: 3b 05 20 cd 29 c0 cmp 0xc029cd20,%eax
Code; c012d06b <__free_pages_ok+3b/200>
13: 72 00 jb 15 <_EIP+0x15> c012d06d <__free_pages_ok+3d/200>

----------------------------------------------------------------

cpuinfo:

----------------------------------------------------------------
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 4
model name : AMD Athlon(tm) Processor
stepping : 2
cpu MHz : 1200.057
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips : 2392.06
----------------------------------------------------------------


Best regards,

S. Fuhrmann
--
S. Fuhrmann


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