网络问题

我自己设计的包含串口和网口的底板，用的TQ2440核心板，底板参照TQ2440开发板，原理图和天嵌提供的一模一样。我通过HTML网页控制LED灯，为什么会有时候有下面的报错？当用ping命令时会出现下面的报错，好像是先连接不上后又连接上了,是怎么回事？什么原因引起的？如何解决？
ping 192.168.1.8
PING 192.168.1.8 (192.168.1.8): 56 data bytes
------------[ cut here ]------------
WARNING: at net/sched/sch_generic.c:226 dev_watchdog+0x260/0x280()
NETDEV WATCHDOG: eth0 (dm9000): transmit timed out
Modules linked in: rt5370sta rt73usb rt2x00usb rt2x00lib zd1211rw mac80211 FM_gpio
Backtrace:
[<c0048fd4>] (dump_backtrace+0x0/0x10c) from [<c036f630>] (dump_stack+0x18/0x1c)
r7:c04ade08 r6:c03041f4 r5:c048ae70 r4:000000e2
[<c036f618>] (dump_stack+0x0/0x1c) from [<c0056f50>] (warn_slowpath_common+0x4c/0x80)
[<c0056f04>] (warn_slowpath_common+0x0/0x80) from [<c0056fd0>] (warn_slowpath_fmt+0x30/0x38)
r7:00000000 r6:c388e400 r5:c05182b8 r4:c04ade2c
[<c0056fa0>] (warn_slowpath_fmt+0x0/0x38) from [<c03041f4>] (dev_watchdog+0x260/0x280)
r3:c388e400 r2:c048ae88
r4:c04b41a0
[<c0303f94>] (dev_watchdog+0x0/0x280) from [<c0060e40>] (run_timer_softirq+0x1ac/0x22c)
r7:c0303f94 r6:c04adea8 r5:00000100 r4:c0509800
[<c0060c94>] (run_timer_softirq+0x0/0x22c) from [<c005c120>] (__do_softirq+0x78/0x100)
[<c005c0a8>] (__do_softirq+0x0/0x100) from [<c005c1f0>] (irq_exit+0x48/0x50)
[<c005c1a8>] (irq_exit+0x0/0x50) from [<c0044048>] (_text+0x48/0x70)
[<c0044000>] (_text+0x0/0x70) from [<c0044a44>] (__irq_svc+0x24/0xa0)
Exception stack(0xc04adf48 to 0xc04adf90)
df40:                   f4100000 00000032 f4100000 60000013 c0045ed8 c04ac000
df60: c0045ed8 c04e8744 3001f514 41129200 3001f4e0 c04adf9c c04adfa0 c04adf90
df80: c004650c c0045f38 60000013 ffffffff                                    
r7:c04e8744 r6:00004000 r5:f4000000 r4:ffffffff
[<c0045ed8>] (default_idle+0x0/0xac) from [<c004650c>] (cpu_idle+0x4c/0x68)
[<c00464c0>] (cpu_idle+0x0/0x68) from [<c036cefc>] (rest_init+0x5c/0x70)
r7:c04b04f0 r6:c0020d34 r5:c04e8700 r4:c050bfcc
[<c036cea0>] (rest_init+0x0/0x70) from [<c0008944>] (start_kernel+0x1e0/0x24c)
[<c0008764>] (start_kernel+0x0/0x24c) from [<30008034>] (0x30008034)
r5:c04e87e8 r4:c0007175
---[ end trace 98d2e9ca20d9e5e7 ]---
64 bytes from 192.168.1.8: seq=6 ttl=64 time=2832.625 ms
64 bytes from 192.168.1.8: seq=7 ttl=64 time=1828.061 ms
64 bytes from 192.168.1.8: seq=8 ttl=64 time=823.627 ms
64 bytes from 192.168.1.8: seq=9 ttl=64 time=1.418 ms
64 bytes from 192.168.1.8: seq=10 ttl=64 time=1.420 ms
64 bytes from 192.168.1.8: seq=11 ttl=64 time=1.381 ms
64 bytes from 192.168.1.8: seq=12 ttl=64 time=1.390 ms
64 bytes from 192.168.1.8: seq=13 ttl=64 time=1.443 ms
64 bytes from 192.168.1.8: seq=14 ttl=64 time=1.440 ms
64 bytes from 192.168.1.8: seq=15 ttl=64 time=1.405 ms
64 bytes from 192.168.1.8: seq=16 ttl=64 time=1.408 ms
64 bytes from 192.168.1.8: seq=17 ttl=64 time=1.466 ms
64 bytes from 192.168.1.8: seq=18 ttl=64 time=1.390 ms
64 bytes from 192.168.1.8: seq=19 ttl=64 time=1.449 ms
64 bytes from 192.168.1.8: seq=20 ttl=64 time=1.450 ms
64 bytes from 192.168.1.8: seq=21 ttl=64 time=1.420 ms
64 bytes from 192.168.1.8: seq=22 ttl=64 time=1.419 ms
64 bytes from 192.168.1.8: seq=23 ttl=64 time=1.440 ms
64 bytes from 192.168.1.8: seq=24 ttl=64 time=1.387 ms
64 bytes from 192.168.1.8: seq=25 ttl=64 time=1.418 ms
64 bytes from 192.168.1.8: seq=26 ttl=64 time=1.449 ms
64 bytes from 192.168.1.8: seq=27 ttl=64 time=1.379 ms
64 bytes from 192.168.1.8: seq=28 ttl=64 time=1.423 ms
64 bytes from 192.168.1.8: seq=29 ttl=64 time=1.449 ms
64 bytes from 192.168.1.8: seq=30 ttl=64 time=1.397 ms
64 bytes from 192.168.1.8: seq=31 ttl=64 time=1.412 ms
64 bytes from 192.168.1.8: seq=32 ttl=64 time=1.393 ms
64 bytes from 192.168.1.8: seq=33 ttl=64 time=1.453 ms
64 bytes from 192.168.1.8: seq=34 ttl=64 time=1.417 ms
64 bytes from 192.168.1.8: seq=35 ttl=64 time=1.428 ms
64 bytes from 192.168.1.8: seq=36 ttl=64 time=1.474 ms
64 bytes from 192.168.1.8: seq=37 ttl=64 time=1.382 ms
64 bytes from 192.168.1.8: seq=38 ttl=64 time=1.427 ms
64 bytes from 192.168.1.8: seq=39 ttl=64 time=1.453 ms
64 bytes from 192.168.1.8: seq=40 ttl=64 time=1.383 ms
64 bytes from 192.168.1.8: seq=41 ttl=64 time=1.390 ms
64 bytes from 192.168.1.8: seq=42 ttl=64 time=1.301 ms
64 bytes from 192.168.1.8: seq=43 ttl=64 time=1.711 ms
64 bytes from 192.168.1.8: seq=44 ttl=64 time=1.452 ms
64 bytes from 192.168.1.8: seq=45 ttl=64 time=1.403 ms
64 bytes from 192.168.1.8: seq=46 ttl=64 time=1.427 ms
64 bytes from 192.168.1.8: seq=47 ttl=64 time=1.441 ms
64 bytes from 192.168.1.8: seq=48 ttl=64 time=1.389 ms
64 bytes from 192.168.1.8: seq=49 ttl=64 time=1.405 ms
64 bytes from 192.168.1.8: seq=50 ttl=64 time=1.458 ms
64 bytes from 192.168.1.8: seq=51 ttl=64 time=1.422 ms
64 bytes from 192.168.1.8: seq=52 ttl=64 time=1.420 ms
64 bytes from 192.168.1.8: seq=53 ttl=64 time=1.448 ms
64 bytes from 192.168.1.8: seq=54 ttl=64 time=1.387 ms
64 bytes from 192.168.1.8: seq=55 ttl=64 time=1.429 ms
64 bytes from 192.168.1.8: seq=56 ttl=64 time=1.445 ms
64 bytes from 192.168.1.8: seq=57 ttl=64 time=1.403 ms
64 bytes from 192.168.1.8: seq=58 ttl=64 time=1.399 ms
64 bytes from 192.168.1.8: seq=59 ttl=64 time=1.450 ms
64 bytes from 192.168.1.8: seq=60 ttl=64 time=1.398 ms
64 bytes from 192.168.1.8: seq=61 ttl=64 time=1.428 ms
64 bytes from 192.168.1.8: seq=62 ttl=64 time=1.454 ms
64 bytes from 192.168.1.8: seq=63 ttl=64 time=1.341 ms
64 bytes from 192.168.1.8: seq=64 ttl=64 time=1.418 ms
64 bytes from 192.168.1.8: seq=65 ttl=64 time=1.462 ms
TX: fifo error 0948 05ea 0332 014a
TX: fifo error 02c8 05ea 08b2 07ca
64 bytes from 192.168.1.8: seq=66 ttl=64 time=1.447 ms
64 bytes from 192.168.1.8: seq=67 ttl=64 time=1.411 ms
64 bytes from 192.168.1.8: seq=68 ttl=64 time=2.861 ms
64 bytes from 192.168.1.8: seq=69 ttl=64 time=1.434 ms
64 bytes from 192.168.1.8: seq=70 ttl=64 time=1.427 ms

当我通过HTML网页调用CGI时会出现下面的报错，而且网页也经常打不开，是怎么回事？
bad: scheduling from the idle thread!
Backtrace:
[<c0048fd4>] (dump_backtrace+0x0/0x10c) from [<c036f630>] (dump_stack+0x18/0x1c)
r7:c04af890 r6:00000000 r5:004c4b40 r4:00000000
[<c036f618>] (dump_stack+0x0/0x1c) from [<c005268c>] (dequeue_task_idle+0x24/0x38)
[<c0052668>] (dequeue_task_idle+0x0/0x38) from [<c0051aa8>] (dequeue_task+0x78/0xd8)
[<c0051a30>] (dequeue_task+0x0/0xd8) from [<c036fe28>] (__schedule+0x2a8/0x370)
r7:c04af890 r6:c0045ed8 r5:c04ac000 r4:c04ac000
[<c036fb80>] (__schedule+0x0/0x370) from [<c036ff0c>] (schedule+0x1c/0x2c)
[<c036fef0>] (schedule+0x0/0x2c) from [<c004651c>] (cpu_idle+0x5c/0x68)
r5:c04ac000 r4:c0045ed8
[<c00464c0>] (cpu_idle+0x0/0x68) from [<c036cefc>] (rest_init+0x5c/0x70)
r7:c04b04f0 r6:c0020d34 r5:c04e8700 r4:c050bfcc
[<c036cea0>] (rest_init+0x0/0x70) from [<c0008944>] (start_kernel+0x1e0/0x24c)
[<c0008764>] (start_kernel+0x0/0x24c) from [<30008034>] (0x30008034)
r5:c04e87e8 r4:c0007175

可能是布线问题，建议参考一下网上关于dm9000的布线