Oops in 2.6.7: swap doesn't seem to happen

[ Please CC replies to me. Thanks. ]

Trying to rsync a big directory from one place to another. Not much free memory.

Unable to handle kernel paging request at virtual address 0000186b
 printing eip:
c015ef88
*pde = 00000000
Oops: 0000 [#7]
Modules linked in: nfs lockd sunrpc floppy sg scsi_mod capability commoncap 8139cp ohci_hcd nvidia_agp agpgart evdev ehci_hcd usbcore 8139too mii crc32 forcedeth isofs zlib_inflate ide_cd cdrom rtc unix
CPU:    0
EIP:    0060:[<c015ef88>]    Not tainted
EFLAGS: 00010202   (2.6.7)

EIP is at __d_lookup+0x68/0x100
eax: 0000186b ebx: 0000186b ecx: 00000011 edx: f7f00000
esi: df18df28 edi: 32ae6223 ebp: f6ffff98 esp: df18de58
ds: 007b es: 007b ss: 0068
Process rsync (pid: 19544, threadinfo=df18c000 task=d4df2f30)

Stack: c01245f2 f5e49d80 000003e8 32ae6223 00000000 f7f69834 e360102a 0000000c
       e360102a df18df28 f7fcd160 df18dec0 c0155b70 d3d4b050 df18dec8 
00000001
       e360102a df18dec0 c6ff6ed4 df18dec8 c015602c df18df28 df18dec8 
df18dec0
Call Trace:
 [<c01245f2>] in_group_p+0x42/0x80
 [<c0155b70>] do_lookup+0x30/0xb0
 [<c015602c>] link_path_walk+0x43c/0x850
 [<c0156659>] path_lookup+0x69/0x110
 [<c01568c9>] __user_walk+0x49/0x60
 [<c0151f7c>] vfs_lstat+0x1c/0x60
 [<c01526ab>] sys_lstat64+0x1b/0x40
 [<c0113a10>] do_page_fault+0x0/0x4ff
 [<c0104925>] error_code+0x2d/0x38
 [<c0103efb>] syscall_call+0x7/0xb

Code: 8b 03 0f 18 00 90 8d 6b 98 8b 7c 24 0c 39 7d 14 74 12 8b 1b

What I notice is that swap is not in use:

            total       used       free     shared    buffers     cached
Mem:        907512     883488      24024          0      66184    658980

-/+ buffers/cache: 158324 749188
Swap: 497972 0 497972

config and other junk available on request.

Thankyou,

David N. Welton
[email protected]