Help regarding RT kernel on ARM v7

[meenakshi aggarwal]

Hi,




I am receiving following kernel warning while running kernel

“3.12.19-rt30+ #6 SMP PREEMPT RT Tue Jan 13 15:35:39 IST 2015 armv7l
GNU/Linux” on ARM v7 platform.



Kindly help.





[ 1044.465822] libphy: mdio at 2d24000:02 - Link is Up - 1000/Full

[ 1058.805821] libphy: mdio at 2d24000:00 - Link is Up - 1000/Full

[ 1662.764689] ------------[ cut here ]------------

[ 1662.768867] WARNING: CPU: 1 PID: 18 at net/sched/sch_generic.c:279
dev_watchdog+0x137/0x198()

[ 1662.777581] NETDEV WATCHDOG: eth1 (fsl-gianfar): transmit queue 0 timed
out

[ 1662.876129] Modules linked in:

[ 1662.885557] CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 3.12.19-rt30+ #1

[ 1662.885609] [<80010991>] (unwind_backtrace+0x1/0x88) from [<8000e677>]
(show_stack+0xb/0xc)

[ 1662.885628] [<8000e677>] (show_stack+0xb/0xc) from [<803024d3>]
(dump_stack+0x4b/0x84)

[ 1662.885646] [<803024d3>] (dump_stack+0x4b/0x84) from [<80018d4d>]
(warn_slowpath_common+0x45/0x64)

[ 1662.885660] [<80018d4d>] (warn_slowpath_common+0x45/0x64) from
[<80018d87>] (warn_slowpath_fmt+0x1b/0x24)

[ 1662.885678] [<80018d87>] (warn_slowpath_fmt+0x1b/0x24) from [<8029e5b7>]
(dev_watchdog+0x137/0x198)

[ 1662.885697] [<8029e5b7>] (dev_watchdog+0x137/0x198) from [<8001fe53>]
(call_timer_fn.isra.32+0x17/0x54)

[ 1662.885712] [<8001fe53>] (call_timer_fn.isra.32+0x17/0x54) from
[<8001ff97>] (run_timer_softirq+0x107/0x140)

[ 1662.885725] [<8001ff97>] (run_timer_softirq+0x107/0x140) from
[<8001b7ad>] (do_current_softirqs+0x105/0x1cc)

[ 1662.885737] [<8001b7ad>] (do_current_softirqs+0x105/0x1cc) from
[<8001b9cb>] (run_ksoftirqd+0x23/0x38)

[ 1662.885754] [<8001b9cb>] (run_ksoftirqd+0x23/0x38) from [<8002fb15>]
(smpboot_thread_fn+0x175/0x188)

[ 1662.885769] [<8002fb15>] (smpboot_thread_fn+0x175/0x188) from
[<8002a945>] (kthread+0x5d/0x6c)

[ 1662.885784] [<8002a945>] (kthread+0x5d/0x6c) from [<8000c339>]
(ret_from_fork+0x11/0x38)

[ 1662.893114] ---[ end trace 0000000000000002 ]---

[ 1682.685516] INFO: rcu_preempt detected stalls on CPUs/tasks: {}
(detected by 1, t=2102 jiffies, g=489, c=488, q=1155)

[ 1682.685520] INFO: Stall ended before state dump start




Thanks & Regards
Meenakshi Aggarwal
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