oops in prune_dcache on linux-2.4.20-pre2-ac5

hi,

If this problem is already solved in recent -ac kernels, please ignore.

Aug 26 18:53:23 chienne kernel: Unable to handle kernel paging request at virtual address 08084000
Aug 26 18:53:24 chienne kernel:  printing eip:
Aug 26 18:53:24 chienne kernel: c0140258
Aug 26 18:53:24 chienne kernel: *pde = 00000000
Aug 26 18:53:24 chienne kernel: Oops: 0002
Aug 26 18:53:24 chienne kernel: CPU:    0
Aug 26 18:53:24 chienne kernel: EIP:    0010:[prune_dcache+24/312] Not tainted
Aug 26 18:53:24 chienne kernel: EFLAGS: 00010206
Aug 26 18:53:24 chienne kernel: eax: c0265460   ebx: cf4b8818   ecx: cf4b8000   edx: 08084000
Aug 26 18:53:24 chienne kernel: esi: cf4b8e00   edi: ca2b6280   ebp: 00000308   esp: c1367fa0
Aug 26 18:53:24 chienne kernel: ds: 0018   es: 0018   ss: 0018
Aug 26 18:53:24 chienne kernel: Process kswapd (pid: 4, stackpage=c1367000)
Aug 26 18:53:24 chienne kernel: Stack: 000001d0 00000078 00000000 0008e000 c01405cb 0000096b c0128e5f 00000006
Aug 26 18:53:24 chienne kernel:        000001d0 000001d0 c0264720 00000064 00000000 c0129114 000001d0 00010f00
Aug 26 18:53:24 chienne kernel:        c1349fb8 00000000 0008e000 c0105517 c0105520 00000000 00000078 c0277fd8
Aug 26 18:53:24 chienne kernel: Call Trace: [shrink_dcache_memory+27/52] [do_try_to_free_pages+23/368] [kswapd+240/684] [kernel_thread+31/56] [kernel_thread+40/56]

Here is the lspci output:
00:00.0 Host bridge: Intel Corp. 82815 815 Chipset Host Bridge and Memory Controller Hub (rev 04) 00:02.0 VGA compatible controller: Intel Corp. 82815 CGC [Chipset Graphics Controller] (rev 04) 00:1e.0 PCI bridge: Intel Corp. 82801BA/CA PCI Bridge (rev 11)
00:1f.0 ISA bridge: Intel Corp. 82801BA ISA Bridge (LPC) (rev 11)
00:1f.1 IDE interface: Intel Corp. 82801BA IDE U100 (rev 11)
00:1f.2 USB Controller: Intel Corp. 82801BA/BAM USB (Hub #1) (rev 11)
00:1f.3 SMBus: Intel Corp. 82801BA/BAM SMBus (rev 11)
00:1f.4 USB Controller: Intel Corp. 82801BA/BAM USB (Hub #2) (rev 11)
00:1f.5 Multimedia audio controller: Intel Corp. 82801BA/BAM AC'97 Audio (rev 11) 01:00.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 74) 01:08.0 Ethernet controller: Intel Corp. 82801BA/BAM/CA/CAM Ethernet Controller (rev 03)