[ofa-general] NetEffect, iw_nes and kernel warning

[aluno3 at poczta.onet.pl]

Hello,

I'm using "iw_nes" driver for NetEffect 10Gbit card under linux
2.6.27.10. I run it on PC with 8 processors.

>From time to time kernel shows following warning:

WARNING: at kernel/softirq.c:136 local_bh_enable+0x9b/0xa0()
Modules linked in: iscsi_trgt st sg scst_vdisk scst drbd twofish
twofish_common serpent blowfish sha256_generic crypto_null iscsi_tcp
libiscsi scsi_transport_iscsi bonding e1000e thermal button iw_nes
processor inet_lro ftdi_sio usbserial nls_iso8859_1 nls_cp437
megaraid_sas vfat fat aufs [last unloaded: iscsi_trgt]
Pid: 0, comm: swapper Not tainted 2.6.27.10 #57
 [<c012633e>] warn_on_slowpath+0x3e/0x60
 [<c0130030>] prepare_signal+0xa0/0x130
 [<c0108e05>] read_tsc+0x35/0x40
 [<c0108e05>] read_tsc+0x35/0x40
 [<c013d658>] getnstimeofday+0x38/0x160
 [<c0108e05>] read_tsc+0x35/0x40
 [<c013d658>] getnstimeofday+0x38/0x160
 [<c014057c>] clockevents_program_event+0xbc/0x140
 [<c0141686>] tick_dev_program_event+0x56/0x90
 [<c012a79b>] local_bh_enable+0x9b/0xa0
 [<c0489c05>] skb_copy_bits+0x155/0x290
 [<c048982c>] __pskb_pull_tail+0x5c/0x2e0
 [<e8e3f815>] nes_netdev_start_xmit+0x815/0x8a0 [iw_nes]
 [<e8e3f10d>] nes_netdev_start_xmit+0x10d/0x8a0 [iw_nes]
 [<c013d658>] getnstimeofday+0x38/0x160
 [<c014057c>] clockevents_program_event+0xbc/0x140
 [<c0141686>] tick_dev_program_event+0x56/0x90
 [<c01416df>] tick_program_event+0x1f/0x30
 [<c013b6b6>] hrtimer_interrupt+0x146/0x1b0
 [<e8e3efc7>] nes_nic_send+0x3c7/0x400 [iw_nes]
 [<c048f911>] dev_hard_start_xmit+0x51/0xd0
 [<c049d2cd>] __qdisc_run+0x19d/0x220
 [<c048fe04>] dev_queue_xmit+0x284/0x2a0
 [<c04ab5e8>] ip_finish_output+0x108/0x290
 [<c04abbba>] ip_output+0x8a/0x90
 [<c04ab2a5>] ip_local_out+0x15/0x20
 [<c04abee4>] ip_queue_xmit+0x324/0x390
 [<c04ab2a5>] ip_local_out+0x15/0x20
 [<c04abee4>] ip_queue_xmit+0x324/0x390
 [<c012e809>] lock_timer_base+0x19/0x40
 [<c04c0cc0>] tcp_write_timer+0x0/0xd0
 [<c04bccfe>] tcp_select_window+0x2e/0xd0
 [<c04bd36e>] tcp_transmit_skb+0x27e/0x3c0
 [<c04be81d>] tcp_write_xmit+0x16d/0x240
 [<c04be904>] __tcp_push_pending_frames+0x14/0x70
 [<c04bba14>] tcp_rcv_established+0x3a4/0x740
 [<c04c25f1>] tcp_v4_do_rcv+0xc1/0xd0
 [<c04c2ac0>] tcp_v4_rcv+0x4c0/0x580
 [<c04a888a>] ip_local_deliver_finish+0x4a/0x160
 [<c04a8a1d>] ip_local_deliver+0x7d/0x90
 [<c04a8b06>] ip_rcv_finish+0xd6/0x2d0
 [<c04a8e8c>] ip_rcv+0x18c/0x290
 [<c04902a8>] netif_receive_skb+0x228/0x270
 [<e8e3d4ad>] nes_nic_ce_handler+0x53d/0x680 [iw_nes]
 [<e8e3e3e9>] nes_netdev_poll+0x39/0xc0 [iw_nes]
 [<c04904ca>] net_rx_action+0x7a/0x150
 [<c012a8b8>] __do_softirq+0x78/0xf0
 [<c012a968>] do_softirq+0x38/0x40
 [<c012aa45>] irq_exit+0x75/0x90
 [<c0105abd>] do_IRQ+0x3d/0x70
 [<c01049a3>] common_interrupt+0x23/0x30
 [<c010953a>] mwait_idle+0x2a/0x30
 [<c0102060>] cpu_idle+0x50/0x90
 =======================

I haven't noticed any serious problems so far, but I'm not sure if this
warning isn't caused by some bug,which will cause some serious problem
in the future.Is the reason for this warning appearance known? Is there
any fix for it? Thanks