2.6.20-rc1 sky2 problems (regression?)

[Alex Romosan <romosan@sycorax.lbl.gov>]

under heavy network load the sky2 driver (compiled in the kernel)
locks up and the only way i can get the network back is to reboot the
machine (bringing the network down and back up again doesn't help).
this happens on an amd64 machine (athlon 3500+ processor) and the card
in question is a Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit
Ethernet Controller (rev 15) (from lspci). this is what i see in the
syslog:

kernel: sky2 eth0: rx error, status 0x414a414a length 0
kernel: eth0: hw csum failure.
kernel: 
kernel: Call Trace:
kernel:  <IRQ>  [<ffffffff8044681c>] __skb_checksum_complete+0x4d/0x66
kernel:  [<ffffffff80477bc5>] tcp_v4_rcv+0x147/0x8ea
kernel:  [<ffffffff80479ef2>] raw_rcv_skb+0x9/0x20
kernel:  [<ffffffff8047a2ff>] raw_rcv+0xbe/0xc4
kernel:  [<ffffffff8045ea9d>] ip_local_deliver+0x170/0x21b
kernel:  [<ffffffff8045e8fa>] ip_rcv+0x478/0x4ab
kernel:  [<ffffffff8044905d>] netif_receive_skb+0x184/0x20e
kernel:  [<ffffffff803de8e5>] sky2_poll+0x68f/0x93c
kernel:  [<ffffffff802219ce>] scheduler_tick+0x23/0x2f9
kernel:  [<ffffffff8044a796>] net_rx_action+0x61/0xf0
kernel:  [<ffffffff8022a35f>] __do_softirq+0x40/0x8a
kernel:  [<ffffffff8020a3cc>] call_softirq+0x1c/0x28
kernel:  [<ffffffff8020bbf0>] do_softirq+0x2c/0x7d
kernel:  [<ffffffff8022a313>] irq_exit+0x36/0x42
kernel:  [<ffffffff8020bebe>] do_IRQ+0x8c/0x9e
kernel:  [<ffffffff80208710>] default_idle+0x0/0x3a
kernel:  [<ffffffff80209bf1>] ret_from_intr+0x0/0xa
kernel:  <EOI>  [<ffffffff80208736>] default_idle+0x26/0x3a
kernel:  [<ffffffff8020878c>] cpu_idle+0x42/0x75
kernel:  [<ffffffff805df675>] start_kernel+0x1ce/0x1d3
kernel:  [<ffffffff805df140>] _sinittext+0x140/0x144
kernel: 
kernel: eth0: hw csum failure.
kernel: 
kernel: Call Trace:
kernel:  <IRQ>  [<ffffffff8044681c>] __skb_checksum_complete+0x4d/0x66
kernel:  [<ffffffff80477bc5>] tcp_v4_rcv+0x147/0x8ea
kernel:  [<ffffffff80479ef2>] raw_rcv_skb+0x9/0x20
kernel:  [<ffffffff8047a2ff>] raw_rcv+0xbe/0xc4
kernel:  [<ffffffff8045ea9d>] ip_local_deliver+0x170/0x21b
kernel:  [<ffffffff8045e8fa>] ip_rcv+0x478/0x4ab
kernel:  [<ffffffff8044905d>] netif_receive_skb+0x184/0x20e
kernel:  [<ffffffff803de8e5>] sky2_poll+0x68f/0x93c
kernel:  [<ffffffff80474647>] tcp_delack_timer+0x0/0x1b5
kernel:  [<ffffffff8044a796>] net_rx_action+0x61/0xf0
kernel:  [<ffffffff8022a35f>] __do_softirq+0x40/0x8a
kernel:  [<ffffffff8020a3cc>] call_softirq+0x1c/0x28
kernel:  [<ffffffff8020bbf0>] do_softirq+0x2c/0x7d
kernel:  [<ffffffff8022a313>] irq_exit+0x36/0x42
kernel:  [<ffffffff8020bebe>] do_IRQ+0x8c/0x9e
kernel:  [<ffffffff80209bf1>] ret_from_intr+0x0/0xa
kernel:  <EOI>  [<ffffffff802a8402>] inode2sd+0x104/0x117
kernel:  [<ffffffff802b8cfa>] search_by_key+0xa08/0xbfe
kernel:  [<ffffffff802b8475>] search_by_key+0x183/0xbfe
kernel:  [<ffffffff80284778>] ll_rw_block+0x89/0x9e
kernel:  [<ffffffff802b8475>] search_by_key+0x183/0xbfe
kernel:  [<ffffffff80283cf5>] __find_get_block_slow+0x101/0x10d
kernel:  [<ffffffff80284053>] __find_get_block+0x197/0x1a5
kernel:  [<ffffffff8026800c>] inode_get_bytes+0x2a/0x52
kernel:  [<ffffffff802a89f1>] reiserfs_update_sd_size+0x7e/0x284
kernel:  [<ffffffff80237700>] kthread+0xed/0xfd
kernel:  [<ffffffff802be990>] do_journal_end+0x34b/0xbdd
kernel:  [<ffffffff802b1729>] reiserfs_dirty_inode+0x56/0x76
kernel:  [<ffffffff80284c19>] block_prepare_write+0x1a/0x24
kernel:  [<ffffffff802809b1>] __mark_inode_dirty+0x29/0x197
kernel:  [<ffffffff802a8d04>] reiserfs_commit_write+0x10d/0x19f
kernel:  [<ffffffff80284c19>] block_prepare_write+0x1a/0x24
kernel:  [<ffffffff802484fc>] generic_file_buffered_write+0x4ad/0x6c4
kernel:  [<ffffffff80271b3c>] __pollwait+0x0/0xe0
kernel:  [<ffffffff8022a006>] current_fs_time+0x35/0x3b
kernel:  [<ffffffff80248a8c>] __generic_file_aio_write_nolock+0x379/0x3ec
kernel:  [<ffffffff8049baca>] unix_dgram_recvmsg+0x1be/0x1d9
kernel:  [<ffffffff804b6516>] __mutex_lock_slowpath+0x205/0x210
kernel:  [<ffffffff80248b60>] generic_file_aio_write+0x61/0xc1
kernel:  [<ffffffff80248aff>] generic_file_aio_write+0x0/0xc1
kernel:  [<ffffffff80264e57>] do_sync_readv_writev+0xc0/0x107
kernel:  [<ffffffff802377f7>] autoremove_wake_function+0x0/0x2e
kernel:  [<ffffffff80229d16>] getnstimeofday+0x10/0x28
kernel:  [<ffffffff80264ced>] rw_copy_check_uvector+0x6c/0xdc
kernel:  [<ffffffff802654f7>] do_readv_writev+0xb2/0x18b
kernel:  [<ffffffff80265a2c>] sys_writev+0x45/0x93
kernel:  [<ffffffff802096de>] system_call+0x7e/0x83

and so on. some times i don't get this trace but instead i get:

kernel: sky2 eth0: tx timeout
kernel: sky2 eth0: transmit ring 140 .. 99 report=181 done=181
kernel: sky2 status report lost?
kernel: NETDEV WATCHDOG: eth0: transmit timed out
kernel: sky2 eth0: tx timeout
kernel: sky2 eth0: transmit ring 181 .. 140 report=181 done=181
kernel: sky2 hardware hung? flushing

but the end result is the same, the network card stops responding and
i have to reboot the machine. i can reproduce this on a consistent
basis so if there are any patches, i can try them out and see if they
fix the problem.

this is probably not a regression per se as i saw it as well with
2.6.19 and 2.6.19-rc6. i am not sure if it was there previous to
2.6.19-rc6. suggestions, patches welcome. thanks.

--alex--

-- 
| I believe the moment is at hand when, by a paranoiac and active |
|  advance of the mind, it will be possible (simultaneously with  |
|  automatism and other passive states) to systematize confusion  |
|  and thus to help to discredit completely the world of reality. |