Hi,
I've been experiencing this bug on my Pegasos II (PPC G4 1GHz, 512M
RAM) box for a while: I can reliably kill my machine in about half an
hour while watching some video read from a remote nfs volume (hence
the "mplayer" task in the following dump). It was relatively uneasy to
get proper debug info as the crash happens while video was playing on
the screen, but it's there anyway :)
This particular dump comes from kernel 2.6.19-ck2 but I reproduced the
bug with vanilla 2.6.19 too, so the bug lives in mainline. I'm not
really familiar with that particular code, but I'd gladly provide as
much debug info as I can.
The box is hooked to a gigabit switch and the NIC is configured as
gigabit too. Interestingly, when I reboot immediately after the crash,
the NIC gets a bogus MAC address, and I have to reboot again to get
back to normal.
HTH
T-Bone
--
Thibaut VARENE
http://www.parisc-linux.org/~varenet/
kernel BUG in eth_alloc_tx_desc_index at drivers/net/mv643xx_eth.c:1069!
Oops: Exception in kernel mode, sig: 5 [#1]
PREEMPT
Modules linked in: nfs lockd sunrpc eeprom sbp2 scsi_mod eth1394 uhci_hcd ohci14
NIP: C020F0E0 LR: C0210C54 CTR: C0210B98
REGS: c7f6f670 TRAP: 0700 Not tainted (2.6.19-ck2)
MSR: 00021032 <ME,IR,DR> CR: 24022488 XER: 00000000
TASK = c49a8d10[2227] 'mplayer' THREAD: c7f6e000
GPR00: 00000000 C7F6F720 C49A8D10 DFF41260 DFF41000 0000000B CE0CF932 00000000
GPR08: 00000CEA 00000001 00001000 00000CEB 44022422 1085F9B8 C50B0368 0000B241
GPR16: C7F6FD28 0000B240 00000000 DFF412DC C0380000 00009032 00000400 C7F6E000
GPR24: 00000000 00000000 DFF41000 C7F6E000 C0210B98 CE0EAC80 DFF41260 CE0CF900
NIP [C020F0E0] eth_alloc_tx_desc_index+0x44/0x50
LR [C0210C54] mv643xx_eth_start_xmit+0xbc/0x3b8
Call Trace:
[C7F6F720] [CE0CF930] 0xce0cf930 (unreliable)
[C7F6F760] [C0299714] dev_hard_start_xmit+0x1d4/0x2c8
[C7F6F780] [C029C0E0] dev_queue_xmit+0x2bc/0x334
[C7F6F7A0] [C02B6E1C] ip_output+0x124/0x248
[C7F6F7C0] [C02B7E54] ip_queue_xmit+0x17c/0x404
[C7F6F830] [C02C91BC] tcp_transmit_skb+0x38c/0x7dc
[C7F6F860] [C02C65E4] __tcp_ack_snd_check+0x64/0xbc
[C7F6F870] [C02C8100] tcp_rcv_established+0x5d4/0x980
[C7F6F8A0] [C02CEDCC] tcp_v4_do_rcv+0xd8/0x3e4
[C7F6F8D0] [C02D1610] tcp_v4_rcv+0x788/0x98c
[C7F6F900] [C02B2594] ip_local_deliver+0xe4/0x1a4
[C7F6F920] [C02B2A50] ip_rcv+0x288/0x46c
[C7F6F950] [C0299308] netif_receive_skb+0x214/0x304
[C7F6F980] [C0211CBC] mv643xx_poll+0x41c/0x48c
[C7F6F9D0] [C029B550] net_rx_action+0x98/0x200
[C7F6FA00] [C0026958] __do_softirq+0x80/0xf4
[C7F6FA30] [C0006930] do_softirq+0x58/0x5c
[C7F6FA40] [C0026408] irq_exit+0x60/0x80
[C7F6FA50] [C00069DC] do_IRQ+0xa8/0xc8
[C7F6FA60] [C0012498] ret_from_except+0x0/0x14
--- Exception: 501 at __kmalloc+0x30/0xc0
LR = rpc_malloc+0x48/0xac [sunrpc]
[C7F6FB20] [C3D72508] 0xc3d72508 (unreliable)
[C7F6FB30] [E2A88E18] rpc_malloc+0x48/0xac [sunrpc]
[C7F6FB40] [E2A835F8] call_allocate+0x88/0x108 [sunrpc]
[C7F6FB60] [E2A89554] __rpc_execute+0x94/0x248 [sunrpc]
[C7F6FB80] [E2B0EEB0] nfs_execute_read+0x40/0x64 [nfs]
[C7F6FBB0] [E2B0F6A4] nfs_pagein_one+0x2a0/0x300 [nfs]
[C7F6FBF0] [E2B0FA9C] nfs_readpages+0x118/0x1f8 [nfs]
[C7F6FC40] [C00521DC] __do_page_cache_readahead+0x1e8/0x318
[C7F6FCD0] [C0052390] blockable_page_cache_readahead+0x84/0x114
[C7F6FCF0] [C00524A4] make_ahead_window+0x84/0xd4
[C7F6FD00] [C00525AC] page_cache_readahead+0xb8/0x220
[C7F6FD20] [C004B00C] do_generic_mapping_read+0x574/0x5e8
[C7F6FDC0] [C004D624] generic_file_aio_read+0x120/0x274
[C7F6FE00] [E2B06F00] nfs_file_read+0xc4/0xe4 [nfs]
[C7F6FE30] [C006EB50] do_sync_read+0xc4/0x138
[C7F6FEF0] [C006F734] vfs_read+0xc4/0x1a4
[C7F6FF10] [C006FC24] sys_read+0x4c/0x90
[C7F6FF40] [C0011DF0] ret_from_syscall+0x0/0x38
--- Exception: c01 at 0xf4f54d8
LR = 0x101e83a8
Instruction dump:
5400fffe 0f000000 81030020 81230024 39680001 7c0b53d6 7c0051d6 7d605850
7d694a78 91630020 7d290034 5529d97e <0f090000> 7d034378 4e800020 2f840001
<0>Kernel panic - not syncing: Fatal exception in interrupt
<0>Rebooting in 180 seconds..
