[etherlab-users] Problem with ethercat-devel-r1770 / etherlab-1.3-pre-r550
Andy Rohr
andy.rohr at mindclue.ch
Mon Aug 31 09:20:17 CEST 2009
Hi Jimmy
I have a very similar problem, but no solution.
Setup:
* Ubuntu 8.04, Kernel 2.6.24.7 patched by RTAI 3.6.2
* EtherCAT Master 1.4.0
* Etherlab 1.2
I have error messages like
BUG: unable to handle kernel NULL pointer dereference at 00000000
or
BUG: unable to handle kernel NULL pointer dereference at 00000001
It ends in a kernel panic and i have to restart the machine by pulling the plug...
I searched the internet a little bit. There where some hints to "broken memory" or
"overtemperature". So i checked the memory with memtest86+ for two days. No error.
I'm stuck too, because i don't know where to start searching.
Andy
Jimmy Anderson schrieb:
> Hello,
>
> I have problems running etherlab on my machine.
> Im running a small configured Ubuntu 9.04 server with a patched Linux
> Kernel 2.6.28.7 running the actual rtai cvs version.
> Using the internal realtech chip 8139 for ethercat and a seperate intel
> chip for ethernet access.
>
> Ethercat works well, but when starting the etherlab script (init.d), i
> get a segmentation fault and I can't unload the module rt_appcore anymore.
> See here:
> root at master:/etc/init.d# ./etherlab start
> Starting EtherLab AppCore./etherlab: line 45: 3020 Segmentation
> fault insmod $MODULE_PATH
> root at master:/etc/init.d#
>
> Here the according dmsg response:
> [ 1969.783994] EtherCAT: Master driver devel r1770
> [ 1969.785560] EtherCAT: 1 master waiting for devices.
> [ 1969.811087] 8139too 0000:01:06.0: PCI INT A disabled
> [ 1969.822545] ec_8139too EtherCAT-capable Fast Ethernet driver 0.9.28,
> master devel r1770
> [ 1969.822600] ec_8139too 0000:01:06.0: PCI INT A -> GSI 19 (level, low)
> -> IRQ 19
> [ 1969.823113] EtherCAT: Accepting device 00:22:68:61:02:CC for master 0.
> [ 1969.823126] ec0: RealTek RTL8139 at 0xc800, 00:22:68:61:02:cc, IRQ 19
> [ 1969.823133] ec0: Identified 8139 chip type 'RTL-8100B/8139D'
> [ 1969.823206] EtherCAT: Starting EtherCAT-IDLE thread.
> [ 1983.045623] I-pipe: Domain RTAI registered.
> [ 1983.045636] RTAI[hal]: <magma> mounted over IPIPE-NOTHREADS 2.2-06.
> [ 1983.045642] RTAI[hal]: compiled with gcc version 4.3.3 (Ubuntu
> 4.3.3-5ubuntu4) .
> [ 1983.045738] RTAI[hal]: mounted (IPIPE-NOTHREADS, IMMEDIATE (INTERNAL
> IRQs VECTORED), ISOL_CPUS_MASK: 0).
> [ 1983.045743] PIPELINE layers:
> [ 1983.045748] f830bc80 9ac15d93 RTAI 200
> [ 1983.045753] c0402500 0 Linux 100
> [ 1983.092416] RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.
> [ 1983.092748] RTAI[sched]: IMMEDIATE, MP, USER/KERNEL SPACE: <with RTAI
> OWN KTASKs>, <uses LINUX SYSCALLs>, kstacks pool size = 524288 bytes.
> [ 1983.092762] RTAI[sched]: hard timer type/freq = APIC/8313733(Hz);
> default timing: periodic; linear timed lists.
> [ 1983.092770] RTAI[sched]: Linux timer freq = 1000 (Hz), TimeBase freq
> = 1596161000 hz.
> [ 1983.092775] RTAI[sched]: timer setup = 999 ns, resched latency = 2943 ns.
> [ 1983.127222] RTAI[math]: loaded.
> [ 1983.138932] Starting RT-AppCore 1.3-pre
> [ 1983.138989] BUG: unable to handle kernel NULL pointer dereference at
> 00000000
> [ 1983.139616] IP: [<c01cfc94>] vsnprintf+0x484/0x4b9
> [ 1983.139657] *pde = 00000000
> [ 1983.139665] Oops: 0000 [#1] PREEMPT SMP
> [ 1983.139694] last sysfs file: /sys/module/mii/initstate
> [ 1983.139719] Modules linked in: rt_appcore(+) rtai_math rtai_sem
> rtai_sched rtai_hal ec_8139too ec_master ac battery wmi rfkill
> input_polldev container video output sbs sbshc ipv6 loop iTCO_wdt
> iTCO_vendor_support serio_raw rng_core intel_agp agpgart parport_pc
> parport button evdev ext3 jbd mbcache sg sd_mod ata_generic pata_acpi
> ata_piix libata scsi_mod usbhid hid ide_pci_generic piix 8139cp e1000
> ide_core ehci_hcd mii uhci_hcd usbcore fan thermal_sys fuse [last
> unloaded: 8139too]
> [ 1983.140019]
> [ 1983.140019] Pid: 3020, comm: insmod Not tainted (2.6.28.7-rtai #1) O.E.M
> [ 1983.140019] EIP: 0060:[<c01cfc94>] EFLAGS: 00010292 CPU: 0
> [ 1983.140019] EIP is at vsnprintf+0x484/0x4b9
> [ 1983.140019] EAX: f6a0dab0 EBX: f6a0da00 ECX: 00000000 EDX: 00000014
> [ 1983.140019] ESI: f6a0da9c EDI: f69f9e40 EBP: 00000000 ESP: f69f9cf0
> [ 1983.140019] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> [ 1983.140019] Process insmod (pid: 3020, ti=f69f8000 task=f64ba180
> task.ti=f69f8000)
> [ 1983.140019] I-pipe domain Linux
> [ 1983.140019] Stack:
> [ 1983.140019] 00000014 f6a0da9c c01cfc8e f6a0dab0 f69f9e44 c01cf7ca
> f69f9e84 f64e5580
> [ 1983.140019] f69f9e88 c02e176c c01cfaa1 ffffffff 00000001 f701d774
> c01cb7fa f69f9d70
> [ 1983.140019] c0419af8 00000006 00000001 00000000 ffffffc1 00000001
> 00000000 f69d6f40
> [ 1983.140019] Call Trace:
> [ 1983.140019] [<c01cfc8e>] vsnprintf+0x47e/0x4b9
> [ 1983.140511] [<c01cf7ca>] string+0x27/0x6d
> [ 1983.140511] [<c01cfaa1>] vsnprintf+0x291/0x4b9
> [ 1983.140511] [<c01cb7fa>] idr_get_empty_slot+0x145/0x202
> [ 1983.140511] [<c011772d>] __wake_up+0x2a/0x3d
> [ 1983.140511] [<c029c31f>] _spin_unlock_irqrestore+0x15/0x2b
> [ 1983.140511] [<c02542aa>] netlink_broadcast+0x2d9/0x31a
> [ 1983.140511] [<c01ccaa2>] kobject_uevent_env+0x2e6/0x308
> [ 1983.140511] [<c022b72a>] device_create_vargs+0x71/0x99
> [ 1983.140511] [<f82b0000>] init_module+0x0/0xda [rt_appcore]
> [ 1983.140511] [<c022b770>] device_create+0x1e/0x22
> [ 1983.140511] [<f8343a1e>] rtp_fio_init+0xd5/0x11d [rt_appcore]
> [ 1983.140511] [<f82b0084>] init_module+0x84/0xda [rt_appcore]
> [ 1983.140511] [<f82b0000>] init_module+0x0/0xda [rt_appcore]
> [ 1983.140511] [<c010104d>] _stext+0x4d/0x157
> [ 1983.140511] [<c0156e4b>] free_hot_cold_page+0x209/0x23e
> [ 1983.140511] [<c013e33a>] load_module+0x145f/0x160c
> [ 1983.140511] [<f82dc69a>] rt_sem_wait+0x0/0x80b [rtai_sem]
> [ 1983.140511] [<c013e624>] sys_init_module+0x87/0x174
> [ 1983.140511] [<c01038e6>] sysenter_do_call+0x12/0x16
> [ 1983.140511] Code: d2 8b 03 f6 44 24 10 02 74 01 99 ff 74 24 10 ff 74
> 24 1c ff 74 24 1c 51 52 50 8b 54 24 24 89 f0 e8 37 f5 ff ff 89 c6 83 c4
> 18 45 <8a> 45 00 84 c0 0f 85 dc fb ff ff 83 3c 24 00 74 13 3b 74 24 0c
> [ 1983.140511] EIP: [<c01cfc94>] vsnprintf+0x484/0x4b9 SS:ESP 0068:f69f9cf0
> [ 1983.141620] ---[ end trace 1f35437aae9db186 ]---
>
> The problem seems to be:
> Starting RT-AppCore 1.3-pre
> [ 1983.138989] BUG: unable to handle kernel NULL pointer dereference at
> 00000000
>
> I can't locare the origin, searching for days up till now.
> Does anybody have a hint or a way to solve this problem.
>
> Thanx
> Jimmy
>
>
>
>
>
>
>
> ------------------------------------------------------------------------
>
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