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Subject1000_clean_tx_irq: Detected Tx Unit Hang / sch_generic.c:261 dev_watchdog+0xbd/0x15d()
  Hi,

Using virtualbox w/ kernel 2.6.32-trunk-686-bigmem there was this msg in the logs:

[ 0.000000] Linux version 2.6.32-trunk-686-bigmem (Debian 2.6.32-5) (ben@decadent.org.uk) (gcc version 4.3.4 (Debian 4.3.4-6) ) #1 SMP Sun Jan 10 07:12:17 UTC 2010
[ 3.800101] e1000 0000:00:08.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[ 3.800101] e1000 0000:00:08.0: setting latency timer to 64
[ 4.721091] e1000: 0000:00:08.0: e1000_probe: (PCI:33MHz:32-bit) 08:00:27:aa:bb:cc
[ 4.792100] e1000: eth1: e1000_probe: Intel(R) PRO/1000 Network Connection
[ 21.776125] e1000: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[ 22.153115] eth0: link up, 100Mbps, full-duplex
[ 32.460164] eth1: no IPv6 routers present
[ 324.004821] e1000: eth1: e1000_clean_tx_irq: Detected Tx Unit Hang
[ 324.004821] Tx Queue <0>
[ 324.004821] TDH <ff>
[ 324.004821] TDT <1>
[ 324.004821] next_to_use <1>
[ 324.004821] next_to_clean <ff>
[ 324.004821] buffer_info[next_to_clean]
[ 324.004821] time_stamp <1528>
[ 324.004821] next_to_watch <0>
[ 324.004821] jiffies <1771>
[ 324.004821] next_to_watch.status <0>
[ 326.004767] e1000: eth1: e1000_clean_tx_irq: Detected Tx Unit Hang
[ 326.004767] Tx Queue <0>
[ 326.004767] TDH <ff>
[ 326.004767] TDT <1>
[ 326.004767] next_to_use <1>
[ 326.004767] next_to_clean <ff>
[ 326.004767] buffer_info[next_to_clean]
[ 326.004767] time_stamp <1528>
[ 326.004767] next_to_watch <0>
[ 326.004767] jiffies <1965>
[ 326.004767] next_to_watch.status <0>
[ 327.004048] ------------[ cut here ]------------
[ 327.004048] WARNING: at /tmp/buildd/linux-2.6-2.6.32/debian/build/source_i386_none/net/sched/sch_generic.c:261 dev_watchdog+0xbd/0x15d()
[ 327.004048] Hardware name: VirtualBox
[ 327.004048] NETDEV WATCHDOG: eth1 (e1000): transmit queue 0 timed out
[ 327.004048] Modules linked in: vboxvideo drm agpgart ppdev lp vboxvfs nls_base fuse loop dm_crypt dm_mod snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm parport_pc i2c_piix4 snd_timer psmouse parport snd ac battery i2c_core pcspkr serio_raw processor evdev soundcore snd_page_alloc vboxguest ext3 jbd mbcache ide_gd_mod ata_generic libata scsi_mod ide_pci_generic floppy piix e1000 button ide_core pcnet32 mii thermal fan thermal_sys [last unloaded: scsi_wait_scan]
[ 327.004048] Pid: 0, comm: swapper Not tainted 2.6.32-trunk-686-bigmem #1
[ 327.004048] Call Trace:
[ 327.004048] [<c1036af1>] ? warn_slowpath_common+0x5e/0x8a
[ 327.004048] [<c11e76d0>] ? dev_watchdog+0x0/0x15d
[ 327.004048] [<c1036b4f>] ? warn_slowpath_fmt+0x26/0x2a
[ 327.004048] [<c11e778d>] ? dev_watchdog+0xbd/0x15d
[ 327.004048] [<c1026a98>] ? enqueue_task+0x68/0x73
[ 327.004048] [<c1033994>] ? try_to_wake_up+0x25d/0x269
[ 327.004048] [<c1034631>] ? scheduler_tick+0xd3/0x1ec
[ 327.004048] [<c10417cc>] ? run_timer_softirq+0x16a/0x1eb
[ 327.004048] [<c103bbd0>] ? __do_softirq+0xaa/0x151
[ 327.004048] [<c103bca8>] ? do_softirq+0x31/0x3c
[ 327.004048] [<c103bd7e>] ? irq_exit+0x26/0x58
[ 327.004048] [<c1019b28>] ? smp_apic_timer_interrupt+0x6c/0x76
[ 327.004048] [<c1008995>] ? apic_timer_interrupt+0x31/0x38
[ 327.004048] [<c10400e0>] ? ftrace_profile_timer_start+0x1a/0xab
[ 327.004048] [<c10202ec>] ? native_safe_halt+0x2/0x3
[ 327.004048] [<c100decb>] ? default_idle+0x3c/0x5a
[ 327.004048] [<c10071e8>] ? cpu_idle+0x89/0xa5
[ 327.004048] [<c13b4811>] ? start_kernel+0x30c/0x311
[ 327.004048] ---[ end trace de6e4e7bd967f783 ]---
[ 327.092180] e1000: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX
[ 937.503622] hrtimer: interrupt too slow, forcing clock min delta to 42884154 ns

Cheers,

Nils



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