[etherlab-users] BUG: scheduling while atomic

[James Zatorski]

I am running Linux Mint 13 with the 3.2.0 kernel and etherlab for
generic hardware and have connected my EtherCAT bus to a dedicated NIC.

I modified the mini example to recognize the digital I/O devices on my
EtherCAT bus and I can successfully read/write to the devices.

When I look into the syslog I see a LARGE number of "BUG: scheduling
while atomic:" messages followed by what appears to be a crash dump.
(see below)  If I leave the code running, after a time, the machine
locks-up and my only recourse is to pull power to the machine.

I have not done any Linux kernel development in the past, so do not know
how to approach diagnosing/correcting this problem.  Any assistance
would be appreciated.

 - jimzat

Nov  3 09:07:04 SCPC70-7 kernel: [249529.868676] BUG: scheduling while
atomic: swapper/1/0/0x10000100
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868679] Modules linked in:
ec_mini(O) ec_generic(O) ec_master(O) pci_stub vboxpci(O) vboxnetadp(O)
vboxnetflt(O) vboxdrv(O) bnep rfcomm bluetooth binfmt_misc
snd_hda_codec_analog dell_wmi ppdev sparse_keymap joydev psmouse dcdbas
serio_raw radeon ttm drm_kms_helper drm i2c_algo_bit wmi nvidia(P)
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi
snd_seq_midi_event snd_seq parport_pc snd_timer mac_hid snd_seq_device
snd soundcore snd_page_alloc i7core_edac edac_core lp parport usbhid hid
e1000 tg3 [last unloaded: ec_master]
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868711] CPU 1 
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868712] Modules linked in:
ec_mini(O) ec_generic(O) ec_master(O) pci_stub vboxpci(O) vboxnetadp(O)
vboxnetflt(O) vboxdrv(O) bnep rfcomm bluetooth binfmt_misc
snd_hda_codec_analog dell_wmi ppdev sparse_keymap joydev psmouse dcdbas
serio_raw radeon ttm drm_kms_helper drm i2c_algo_bit wmi nvidia(P)
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi
snd_seq_midi_event snd_seq parport_pc snd_timer mac_hid snd_seq_device
snd soundcore snd_page_alloc i7core_edac edac_core lp parport usbhid hid
e1000 tg3 [last unloaded: ec_master]
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868736] 
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868738] Pid: 0, comm: swapper/1
Tainted: P           O 3.2.0-61-generic #93-Ubuntu Dell Inc. Precision
WorkStation T3500  /09KPNV
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868742] RIP:
0010:[<ffffffff8137035d>]  [<ffffffff8137035d>] intel_idle+0xed/0x150
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868749] RSP:
0018:ffff8801b4f4fe38  EFLAGS: 00000206
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868751] RAX: 0000000000000000
RBX: ffffffff81665c8d RCX: 0000000000000000
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868753] RDX: 0000000000000f90
RSI: 0000000000000000 RDI: 00000000003ccc74
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868755] RBP: ffff8801b4f4fe98
R08: 0000000000000000 R09: 0000000000000f5d
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868757] R10: 0000000000001de5
R11: 0000000000000000 R12: 00000000ffffffff
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868758] R13: ffff8801b4f4fe64
R14: 0000000000000004 R15: ffff8801b4f4fdb8
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868761] FS:
0000000000000000(0000) GS:ffff8801b9220000(0000) knlGS:0000000000000000
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868763] CS:  0010 DS: 0000 ES:
0000 CR0: 000000008005003b
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868764] CR2: 00007fcdf00a1688
CR3: 0000000001c05000 CR4: 00000000000006e0
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868766] DR0: 0000000000000000
DR1: 0000000000000000 DR2: 0000000000000000
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868768] DR3: 0000000000000000
DR6: 00000000ffff0ff0 DR7: 0000000000000400
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868770] Process swapper/1 (pid:
0, threadinfo ffff8801b4f4e000, task ffff8801b4f51700)
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868772] Stack:
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868773]  0000000000000000
0000000000000f90 ffff8801b4f4fe98 0000000000000000
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868776]  0000000000000f90
00000001003c1d56 0000000000000000 ffff8801b923ab70
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868779]  00000000fffffff0
0000000000000003 0000000000000001 0000000000000000
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868783] Call Trace:
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868788]  [<ffffffff8150c651>]
cpuidle_idle_call+0xc1/0x290
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868792]  [<ffffffff8101322a>]
cpu_idle+0xca/0x120
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868797]  [<ffffffff8163fc4b>]
start_secondary+0xd9/0xdb
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868798] Code: d2 ff 4c 29 f8 48
89 c7 e8 b1 df cf ff 4c 69 f0 40 42 0f 00 48 89 45 a0 48 89 55 a8 48 89
45 b8 48 89 55 c0 49 01 d6 fb 66 66 90 <66> 66 90 85 1d 02 b4 8f 00 75
0e 48 8d 75 cc bf 05 00 00 00 e8 
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868824] Call Trace:
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868826]  [<ffffffff8150c651>]
cpuidle_idle_call+0xc1/0x290
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868829]  [<ffffffff8101322a>]
cpu_idle+0xca/0x120
Nov  3 09:07:04 SCPC70-7 kernel: [249529.868832]  [<ffffffff8163fc4b>]
start_secondary+0xd9/0xdb
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