Sorry to reply to myself, but after a while the panda doesn't reply any more over network and the syslog has lots of entries like this one:

Aug 27 13:00:38 panda kernel: [87136.303894] [<c044c1e9>] (__schedule_bug+0x39/0x50) from [<c045219f>] (__schedule+0x51f/0x5c4)

Aug 27 13:00:38 panda kernel: [87136.303924] [<c045219f>] (__schedule+0x51f/0x5c4) from [<c045250b>] (schedule_preempt_disabled+0xf/0x10)

Aug 27 13:00:38 panda kernel: [87136.303924] [<c045250b>] (schedule_preempt_disabled+0xf/0x10) from [<c0058bbb>] (cpu_startup_entry+0x12f/0x164)

Aug 27 13:00:38 panda kernel: [87136.303955] [<c0058bbb>] (cpu_startup_entry+0x12f/0x164) from [<80448ea9>] (0x80448ea9)

Aug 27 13:00:38 panda kernel: [87136.307403] BUG: scheduling while atomic: swapper/1/0/0xffff0000

Aug 27 13:00:38 panda kernel: [87136.313781] Modules linked in: snd_soc_omap_abe_twl6040 snd_soc_omap_mcpdm snd_soc_twl6040 snd_soc_omap snd_soc_omap_mcbsp snd_soc_core snd_compress regmap_spi snd_pcm snd_page_alloc snd_timer snd soundcore gator

Aug 27 13:00:38 panda kernel: [87136.313842] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 3.10.1.0-1-linaro-omap #1ubuntu1~ci+130723003933-Ubuntu

Aug 27 13:00:38 panda kernel: [87136.313842] [<c001175d>] (unwind_backtrace+0x1/0x9c) from [<c000f625>] (show_stack+0x11/0x14)

Aug 27 13:00:38 panda kernel: [87136.313873] [<c000f625>] (show_stack+0x11/0x14) from [<c044c1e9>] (__schedule_bug+0x39/0x50)

Aug 27 13:00:38 panda kernel: [87136.313903] [<c044c1e9>] (__schedule_bug+0x39/0x50) from [<c045219f>] (__schedule+0x51f/0x5c4)

Aug 27 13:00:38 panda kernel: [87136.313934] [<c045219f>] (__schedule+0x51f/0x5c4) from [<c045250b>] (schedule_preempt_disabled+0xf/0x10)

Aug 27 13:00:38 panda kernel: [87136.313934] [<c045250b>] (schedule_preempt_disabled+0xf/0x10) from [<c0058bbb>] (cpu_startup_entry+0x12f/0x164)

Aug 27 13:00:38 panda kernel: [87136.313964] [<c0058bbb>] (cpu_startup_entry+0x12f/0x164) from [<80448ea9>] (0x80448ea9)

Aug 27 13:00:38 panda kernel: [87136.317382] BUG: scheduling while atomic: swapper/1/0/0xffff0000

Aug 27 13:00:38 panda kernel: [87136.323760] Modules linked in: snd_soc_omap_abe_twl6040 snd_soc_omap_mcpdm snd_soc_twl6040 snd_soc_omap snd_soc_omap_mcbsp snd_soc_core snd_compress regmap_spi snd_pcm snd_page_alloc snd_timer snd soundcore gator

Aug 27 13:00:38 panda kernel: [87136.323822] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G W 3.10.1.0-1-linaro-omap #1ubuntu1~ci+130723003933-Ubuntu

Aug 27 13:00:38 panda kernel: [87136.323822] [<c001175d>] (unwind_backtrace+0x1/0x9c) from [<c000f625>] (show_stack+0x11/0x14)

Aug 27 13:00:38 panda kernel: [87136.323822] [<c000f625>] (show_stack+0x11/0x14) from [<c044c1e9>] (__schedule_bug+0x39/0x50)

Aug 27 13:00:38 panda kernel: [87136.323883] [<c044c1e9>] (__schedule_bug+0x39/0x50) from [<c045219f>] (__schedule+0x51f/0x5c4)

Aug 27 13:00:38 panda kernel: [87136.323913] [<c045219f>] (__schedule+0x51f/0x5c4) from [<c045250b>] (schedule_preempt_disabled+0xf/0x10)

Aug 27 13:00:38 panda kernel: [87136.323913] [<c045250b>] (schedule_preempt_disabled+0xf/0x10) from [<c0058bbb>] (cpu_startup_entry+0x12f/0x164)

Aug 27 13:00:38 panda kernel: [87136.323944] [<c0058bbb>] (cpu_startup_entry+0x12f/0x164) from [<80448ea9>] (0x80448ea9)

Aug 27 13:00:38 panda kernel: [87136.327392] BUG: scheduling while atomic: swapper/1/0/0xffff0000

Aug 27 13:00:38 panda kernel: [87136.333770] Modules linked in: snd_soc_omap_abe_twl6040 snd_soc_omap_mcpdm snd_soc_twl6040 snd_soc_omap snd_soc_omap_mcbsp snd_soc_core snd_compress regmap_spi snd_pcm snd_page_alloc snd_timer snd soundcore gator

Rgds,

Chris

On Tue, Aug 27, 2013 at 8:50 AM, Christian Hoffmann <chrmhoffmann@gmail.com> wrote:

Hi,

running the current panda linaro kernel 3.10.1.0-1-linaro-omap from linaro release 13.07, I run into a few kernel stacks.

Eg.:

[33222.473022] ------------[ cut here ]------------

[33222.473052] WARNING: at /build/buildd/linux-linaro-omap-3.10.1-3.10.1.0/kernel/timer.c:1122 call_timer_fn+0x81/0xb0()
[33222.473083] timer: process_timeout+0x1/0xc preempt leak: 00000100 -> 00000000

[33222.473083] Modules linked in: snd_soc_omap_abe_twl6040 snd_soc_omap_mcpdm snd_soc_twl6040 snd_soc_omap snd_soc_omap_mcbsp snd_soc_core snd_compress regmap_spi snd_pcm snd_page_alloc snd_timer snd soundcore gator

[33222.473114] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.10.1.0-1-linaro-omap #1ubuntu1~ci+130723003933-Ubuntu
[33222.473114] [<c001175d>] (unwind_backtrace+0x1/0x9c) from [<c000f625>] (show_stack+0x11/0x14)

[33222.473114] [<c000f625>] (show_stack+0x11/0x14) from [<c002b8ad>] (warn_slowpath_common+0x39/0x54)
[33222.473236] [<c002b8ad>] (warn_slowpath_common+0x39/0x54) from [<c002b933>] (warn_slowpath_fmt+0x23/0x2c)

[33222.473266] [<c002b933>] (warn_slowpath_fmt+0x23/0x2c) from [<c00351e5>] (call_timer_fn+0x81/0xb0)
[33222.473266] [<c00351e5>] (call_timer_fn+0x81/0xb0) from [<c0035cb9>] (run_timer_softirq+0x13d/0x1c8)

[33222.473297] [<c0035cb9>] (run_timer_softirq+0x13d/0x1c8) from [<c003111f>] (__do_softirq+0xc3/0x1c0)
[33222.473327] [<c003111f>] (__do_softirq+0xc3/0x1c0) from [<c0031447>] (irq_exit+0x63/0x88)

[33222.473327] [<c0031447>] (irq_exit+0x63/0x88) from [<c001079d>] (handle_IPI+0x59/0x158)
[33222.473358] [<c001079d>] (handle_IPI+0x59/0x158) from [<c00084ff>] (gic_handle_irq+0x4b/0x50)

[33222.473358] [<c00084ff>] (gic_handle_irq+0x4b/0x50) from [<c045315b>] (__irq_svc+0x3b/0x5c)
[33222.473388] Exception stack(0xed8cdf50 to 0xed8cdf98)
[33222.473388] df40: 00000002 00000000 00000000 00000001

[33222.473419] df60: edc7664c 00000002 c045c2e0 c0ff00b8 00000002 c06f189c edc76640 ed8cc000
[33222.473419] df80: 3b9ac9ff ed8cdf98 c0284b33 c0375b04 00000173 ffffffff
[33222.473449] [<c045315b>] (__irq_svc+0x3b/0x5c) from [<c0375b04>] (cpuidle_enter_state_coupled+0x1dc/0x210)

[33222.473480] [<c0375b04>] (cpuidle_enter_state_coupled+0x1dc/0x210) from [<c037436d>] (cpuidle_idle_call+0xbd/0x158)
[33222.473480] [<c037436d>] (cpuidle_idle_call+0xbd/0x158) from [<c000d4b1>] (arch_cpu_idle+0xd/0x28)

[33222.473480] [<c000d4b1>] (arch_cpu_idle+0xd/0x28) from [<c0058ae9>] (cpu_startup_entry+0x5d/0x164)
[33222.473541] [<c0058ae9>] (cpu_startup_entry+0x5d/0x164) from [<80448ea9>] (0x80448ea9)

[33222.473541] ---[ end trace 0f39b8196adfb0ec ]---

Full dmesg can be found here:
https://dl.dropboxusercontent.com/u/21820416/panda-dmesg

Is this a known issue?

Rgds,
Chris