我有一个带有 Broadcom 以太网端口的 debian linux 机器（Debian Squeeze），如果我ethtool在嗅探接口之前运行修改 NIC 缓冲区，每隔几个小时就会死锁一次。
据我所知，内核看门狗定时器正在跳闸......
NETDEV WATCHDOG: eth3 (bnx2): transmit queue 0 timed out
我认为有一种方法可以通过系统ioctl调用来控制看门狗定时器（参考：EmbeddedFreak：如何使用 linux watchdog）。
问题
如何找到控制 eth3的看门狗定时器？如果您能告诉我如何更改计时器甚至禁用看门狗，则可以加分...
堆栈跟踪
Apr 30 08:38:44 Hotcoffee kernel: [275460.837147] ------------[ cut here ]------------
Apr 30 08:38:44 Hotcoffee kernel: [275460.837166] WARNING: at /build/buildd-linux-2.6_2.6.32-41squeeze2-amd64-NDo8b7/linux-2.6-2.6.32/debian/build/source_amd64_none/net/sched/sch_generic.c:261 dev_watchdog+0xe2/0x194()
Apr 30 08:38:44 Hotcoffee kernel: [275460.837169] Hardware name: PowerEdge R710
Apr 30 08:38:44 Hotcoffee kernel: [275460.837171] NETDEV WATCHDOG: eth3 (bnx2): transmit queue 0 timed out
Apr 30 08:38:44 Hotcoffee kernel: [275460.837172] Modules linked in: 8021q garp stp parport_pc ppdev lp parport pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv ext2 loop psmouse power_meter button dcdbas evdev pcspkr processor serio_raw ext4 mbcache jbd2 crc16 sg sr_mod cdrom ses ata_generic sd_mod usbhid hid crc_t10dif enclosure uhci_hcd ehci_hcd megaraid_sas ata_piix thermal libata usbcore nls_base scsi_mod bnx2 thermal_sys [last unloaded: scsi_wait_scan]
Apr 30 08:38:44 Hotcoffee kernel: [275460.837202] Pid: 0, comm: swapper Not tainted 2.6.32-5-amd64 #1
Apr 30 08:38:44 Hotcoffee kernel: [275460.837204] Call Trace:
Apr 30 08:38:44 Hotcoffee kernel: [275460.837206] <IRQ> [<ffffffff81263086>] ? dev_watchdog+0xe2/0x194
Apr 30 08:38:44 Hotcoffee kernel: [275460.837211] [<ffffffff81263086>] ? dev_watchdog+0xe2/0x194
Apr 30 08:38:44 Hotcoffee kernel: [275460.837217] [<ffffffff8104df9c>] ? warn_slowpath_common+0x77/0xa3
Apr 30 08:38:44 Hotcoffee kernel: [275460.837220] [<ffffffff81262fa4>] ? dev_watchdog+0x0/0x194
Apr 30 08:38:44 Hotcoffee kernel: [275460.837223] [<ffffffff8104e024>] ? warn_slowpath_fmt+0x51/0x59
Apr 30 08:38:44 Hotcoffee kernel: [275460.837228] [<ffffffff8104a4ba>] ? try_to_wake_up+0x289/0x29b
Apr 30 08:38:44 Hotcoffee kernel: [275460.837231] [<ffffffff81262f78>] ? netif_tx_lock+0x3d/0x69
Apr 30 08:38:44 Hotcoffee kernel: [275460.837237] [<ffffffff8124dda3>] ? netdev_drivername+0x3b/0x40
Apr 30 08:38:44 Hotcoffee kernel: [275460.837240] [<ffffffff81263086>] ? dev_watchdog+0xe2/0x194
Apr 30 08:38:44 Hotcoffee kernel: [275460.837242] [<ffffffff8103fa2a>] ? __wake_up+0x30/0x44
Apr 30 08:38:44 Hotcoffee kernel: [275460.837249] [<ffffffff8105a71b>] ? run_timer_softirq+0x1c9/0x268
Apr 30 08:38:44 Hotcoffee kernel: [275460.837252] [<ffffffff81053dc7>] ? __do_softirq+0xdd/0x1a6
Apr 30 08:38:44 Hotcoffee kernel: [275460.837257] [<ffffffff8102462a>] ? lapic_next_event+0x18/0x1d
Apr 30 08:38:44 Hotcoffee kernel: [275460.837262] [<ffffffff81011cac>] ? call_softirq+0x1c/0x30
Apr 30 08:38:44 Hotcoffee kernel: [275460.837265] [<ffffffff8101322b>] ? do_softirq+0x3f/0x7c
Apr 30 08:38:44 Hotcoffee kernel: [275460.837267] [<ffffffff81053c37>] ? irq_exit+0x36/0x76
Apr 30 08:38:44 Hotcoffee kernel: [275460.837270] [<ffffffff810250f8>] ? smp_apic_timer_interrupt+0x87/0x95
Apr 30 08:38:44 Hotcoffee kernel: [275460.837273] [<ffffffff81011673>] ? apic_timer_interrupt+0x13/0x20
Apr 30 08:38:44 Hotcoffee kernel: [275460.837274] <EOI> [<ffffffffa01bc509>] ? acpi_idle_enter_bm+0x27d/0x2af [processor]
Apr 30 08:38:44 Hotcoffee kernel: [275460.837283] [<ffffffffa01bc502>] ? acpi_idle_enter_bm+0x276/0x2af [processor]
Apr 30 08:38:44 Hotcoffee kernel: [275460.837289] [<ffffffff8123a0ba>] ? cpuidle_idle_call+0x94/0xee
Apr 30 08:38:44 Hotcoffee kernel: [275460.837293] [<ffffffff8100fe97>] ? cpu_idle+0xa2/0xda
Apr 30 08:38:44 Hotcoffee kernel: [275460.837297] [<ffffffff8151c140>] ? early_idt_handler+0x0/0x71
Apr 30 08:38:44 Hotcoffee kernel: [275460.837301] [<ffffffff8151ccdd>] ? start_kernel+0x3dc/0x3e8
Apr 30 08:38:44 Hotcoffee kernel: [275460.837304] [<ffffffff8151c3b7>] ? x86_64_start_kernel+0xf9/0x106
Apr 30 08:38:44 Hotcoffee kernel: [275460.837306] ---[ end trace 92c65e52c9e327ec ]---