'swapper'导致内核崩溃，请问是哪些原因引起??

我的内核是linux 2.6.34,硬件为POWERPC8313,扩展了2个10/100m网口.在用扩展的网口进行tcp通讯时，
大概2天左右会导致系统崩溃。如下信息，请大家帮我分析下，可能是什么原因引起的呢？？

BUG: soft lockup - CPU#0 stuck for 61s! [swapper:0]
Modules linked in:
NIP: c01ff824 LR: c01ff7c0 CTR: c01ff798
REGS: c0403b70 TRAP: 0901 Not tainted (2.6.34)
MSR: 00009032 CR: 24002088 XER: 20000000
TASK = c03e2410[0] 'swapper' THREAD: c0402000
GPR00: c004f520 c0403c20 c03e2410 00000001 cee85800 00001032 cf403000 00000038
GPR08: 00000000 cee85af8 00000001 00000001 00000000
Call Trace:
[c0403c20] [c01ffbac] 0xc01ffbac (unreliable)
[c0403c60] [c004f520] 0xc004f520
[c0403c80] [c00520a8] 0xc00520a8
[c0403c90] [c0006164] 0xc0006164
[c0403cb0] [c00114c8] 0xc00114c8
--- Exception: 501 at 0xc004f4f0
LR = 0xc00520a8
[c0403d70] [c0042c28] 0xc0042c28 (unreliable)
[c0403d90] [c00520a8] 0xc00520a8
[c0403da0] [c0006164] 0xc0006164
[c0403dc0] [c00114c8] 0xc00114c8
--- Exception: 501 at 0xc004f4f0
LR = 0xc00520a8
[c0403e80] [0ff37b25] 0xff37b25 (unreliable)
[c0403ea0] [c00520a8] 0xc00520a8
[c0403eb0] [c0006164] 0xc0006164
[c0403ed0] [c00114c8] 0xc00114c8
--- Exception: 501 at 0xc0008fb0
LR = 0xc0008fb0
[c0403f90] [c0008f60] 0xc0008f60 (unreliable)
[c0403fb0] [c0003e1c] 0xc0003e1c
[c0403fc0] [c03b5874] 0xc03b5874
[c0403ff0] [00003438] 0x003438