What does the `kernel: WARNING: at net/sched/sch_generic.c dev_watchdog()` error indicate?
Issue
- System loses network connectivity, network driver backtraces found in
/var/log/messagessimilar to the following:
WARNING: at net/sched/sch_generic.c:... dev_watchdog+0x.../0x...() (Not tainted)
Hardware name: ...
NETDEV WATCHDOG: ethX (<drivername>): transmit queue N timed out
Modules linked in: ...
Pid: ..., comm: ... Not tainted 2.6.32-....el6.x86_64 #1
Call Trace:
<IRQ> [<ffffffff........>] ? warn_slowpath_common+...
[<ffffffff........>] ? warn_slowpath_fmt+...
[<ffffffff........>] ? dev_watchdog+...
[<ffffffff........>] ? run_timer_softirq+...
...
[<ffffffff........>] ? __do_softirq+...
...
[<ffffffff........>] ? call_softirq+...
[<ffffffff........>] ? do_softirq+...
[<ffffffff........>] ? irq_exit+...
...
<EOI> [<ffffffff........>] ? ...
...
Environment
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 5
- Network interfaces using the following drivers, and possibly others:
bnx2bnx2xe1000e1000eigbixgbenetxen_nicmlx4_coreniur8169sky2tg3enic
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