RE: Re-occurance of NFS server panics

["Ian D. Hardy" <I.D.Hardy@xxxxxxxxxxx>]

Steve,

>On Mon, 2002-09-16 at 11:56, Ian D. Hardy wrote:
>> Steve,
>> 
>> Thanks for the quick response. I don't always get a Oops output 
>> (sometimes the server just hangs and requires a reboot). However as
it 
>> happens the server has just crashed again with the following Oops 
>> (through 'ksymoops'):
>
>This one suggests heap corruption more than anything else. 
>
>Steve

I upgraded the kernel to the current CVS (2.4.19-xfs) tree (as of Monday
16th Sept.) today and got a very similar looking Ooops to the one I
reported on Monday, see below. I guess it is very difficult to know what
would have caused any heap corruption. As I understand it there's
nothing in these latest panics to directly link them with XFS? I need to
do some more thinking on this. Any pointers would be very welcome.

Regards Ian Hardy


 kernel BUG at slab.c:1439!
invalid operand: 0000
CPU:    0
EIP:    0010:[<c0133a64>]    Tainted: P 
EFLAGS: 00010016
eax: 5a2cf071   ebx: 006f5b20   ecx: f7edf00c   edx: c1c0f060
esi: e51e6000   edi: e51e6c3c   ebp: e51e6c18   esp: f7eddf48
ds: 0018   es: 0018   ss: 0018
Process kswapd (pid: 5, stackpage=f7edd000)
Stack: 0000293b 00000002 f7edf00c f7edf000 00000000 00000007 00000000
00000000 
       00000000 c1c0f060 00000020 000001d0 00000006 00000000 c0134e59
c036fa08 
       00000006 000001d0 c036fa08 00000000 c0134f0c 00000020 c036fa08
00000002 
Call Trace:    [<c0134e59>] [<c0134f0c>] [<c0134fb1>] [<c0135026>]
[<c013515d>]
  [<c0105000>] [<c0107296>] [<c01350c0>]

Code: 0f 0b 9f 05 a0 54 2b c0 8b 44 24 24 89 ea 8b 48 18 b8 71 f0 
 
Entering kdb (current=0xf7edc000, pid 5) on processor 0 Oops: invalid
operand
due to oops @ 0xc0133a64
eax = 0x5a2cf071 ebx = 0x006f5b20 ecx = 0xf7edf00c edx = 0xc1c0f060 
esi = 0xe51e6000 edi = 0xe51e6c3c esp = 0xf7eddf48 eip = 0xc0133a64 
ebp = 0xe51e6c18 xss = 0x00000018 xcs = 0x00000010 eflags = 0x00010016 
xds = 0xe51e0018 xes = 0x00000018 origeax = 0xffffffff &regs =
0xf7eddf14
[0]kdb> 
 kernel BUG at slab.c:1439!
invalid operand: 0000
CPU:    0
EIP:    0010:[<c0133a64>]    Tainted: P 
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010016
eax: 5a2cf071   ebx: 006f5b20   ecx: f7edf00c   edx: c1c0f060
esi: e51e6000   edi: e51e6c3c   ebp: e51e6c18   esp: f7eddf48
ds: 0018   es: 0018   ss: 0018
Process kswapd (pid: 5, stackpage=f7edd000)
Stack: 0000293b 00000002 f7edf00c f7edf000 00000000 00000007 00000000
00000000 
       00000000 c1c0f060 00000020 000001d0 00000006 00000000 c0134e59
c036fa08 
       00000006 000001d0 c036fa08 00000000 c0134f0c 00000020 c036fa08
00000002 
Call Trace:    [<c0134e59>] [<c0134f0c>] [<c0134fb1>] [<c0135026>]
[<c013515d>]
  [<c0105000>] [<c0107296>] [<c01350c0>]
Code: 0f 0b 9f 05 a0 54 2b c0 8b 44 24 24 89 ea 8b 48 18 b8 71 f0 

>>EIP; c0133a64 <kmem_cache_reap+1c4/490>   <=====
Trace; c0134e58 <shrink_caches+18/90>
Trace; c0134f0c <try_to_free_pages+3c/60>
Trace; c0134fb0 <kswapd_balance_pgdat+50/a0>
Trace; c0135026 <kswapd_balance+26/40>
Trace; c013515c <kswapd+9c/b6>
Trace; c0105000 <_stext+0/0>
Trace; c0107296 <kernel_thread+26/30>
Trace; c01350c0 <kswapd+0/b6>
Code;  c0133a64 <kmem_cache_reap+1c4/490>
00000000 <_EIP>:
Code;  c0133a64 <kmem_cache_reap+1c4/490>   <=====
   0:   0f 0b                     ud2a      <=====
Code;  c0133a66 <kmem_cache_reap+1c6/490>
   2:   9f                        lahf   
Code;  c0133a66 <kmem_cache_reap+1c6/490>
   3:   05 a0 54 2b c0            add    $0xc02b54a0,%eax
Code;  c0133a6c <kmem_cache_reap+1cc/490>
   8:   8b 44 24 24               mov    0x24(%esp,1),%eax
Code;  c0133a70 <kmem_cache_reap+1d0/490>
   c:   89 ea                     mov    %ebp,%edx
Code;  c0133a72 <kmem_cache_reap+1d2/490>
   e:   8b 48 18                  mov    0x18(%eax),%ecx
Code;  c0133a74 <kmem_cache_reap+1d4/490>
  11:   b8 71 f0 00 00            mov    $0xf071,%eax

Entering kdb (current=0xf7edc000, pid 5) on processor 0 Oops: invalid
operand
eax = 0x5a2cf071 ebx = 0x006f5b20 ecx = 0xf7edf00c edx = 0xc1c0f060 
esi = 0xe51e6000 edi = 0xe51e6c3c esp = 0xf7eddf48 eip = 0xc0133a64 
ebp = 0xe51e6c18 xss = 0x00000018 xcs = 0x00000010 eflags = 0x00010016