I got this trace with a recent net-next kernel ( 169bf9121b19 ) running on a KVM host (2 cores). The traffic pattern is low intensity TIPC traffic (and an SSH session).
node1 ~ # [ 2099.839503] ------------[ cut here ]------------ [ 2099.840138] WARNING: CPU: 1 PID: 0 at net/sched/sch_generic.c:303 dev_watchdog+0x231/0x240() [ 2099.841218] NETDEV WATCHDOG: eth0 (e1000): transmit queue 0 timed out [ 2099.842025] Modules linked in: tipc ip6_udp_tunnel udp_tunnel [ 2099.842825] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.0.0-rc3+ #11 [ 2099.843635] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 2099.844611] ffffffff81a8110f ffff880038703d58 ffffffff816214b4 0000000000009b9b [ 2099.845928] ffff880038703da8 ffff880038703d98 ffffffff8104da85 ffff880038703e98 [ 2099.847316] 0000000000000000 ffff880036bd7280 0000000000000001 ffff88003f8cc000 [ 2099.848472] Call Trace: [ 2099.848849] <IRQ> [<ffffffff816214b4>] dump_stack+0x45/0x57 [ 2099.849796] [<ffffffff8104da85>] warn_slowpath_common+0x85/0xc0 [ 2099.850661] [<ffffffff8104db01>] warn_slowpath_fmt+0x41/0x50 [ 2099.851534] [<ffffffff81512781>] dev_watchdog+0x231/0x240 [ 2099.852358] [<ffffffff81512550>] ? dev_graft_qdisc+0x80/0x80 [ 2099.853240] [<ffffffff8109c8d9>] call_timer_fn+0x39/0x120 [ 2099.853958] [<ffffffff8109d5cc>] run_timer_softirq+0x1ec/0x2b0 [ 2099.854722] [<ffffffff81512550>] ? dev_graft_qdisc+0x80/0x80 [ 2099.855458] [<ffffffff81051267>] __do_softirq+0xa7/0x290 [ 2099.856138] [<ffffffff81051545>] irq_exit+0x45/0x50 [ 2099.856780] [<ffffffff81034681>] smp_apic_timer_interrupt+0x41/0x50 [ 2099.857596] [<ffffffff8162876a>] apic_timer_interrupt+0x6a/0x70 [ 2099.858345] <EOI> [<ffffffff8100c82b>] ? default_idle+0x1b/0xc0 [ 2099.859156] [<ffffffff8100d14a>] arch_cpu_idle+0xa/0x10 [ 2099.859831] [<ffffffff81081e3b>] cpu_startup_entry+0x2fb/0x400 [ 2099.860599] [<ffffffff810a7db3>] ? clockevents_register_device+0xe3/0x150 [ 2099.861473] [<ffffffff81032446>] start_secondary+0x146/0x170 [ 2099.862194] ---[ end trace 7b138875a44ca997 ]--- [ 2099.863128] e1000 0000:00:03.0 eth0: Reset adapter [ 2099.863942] Resetting bearer <eth:eth0> [ 2099.900820] e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None No special qdiscs applied to eth0 qdisc pfifo_fast 0: dev eth0 root refcnt 2 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 node1 ~ # ethtool -i eth0 driver: e1000 version: 7.3.21-k8-NAPI firmware-version: bus-info: 0000:00:03.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no Any ideas what could be wrong? //E ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
