Ettore Pedretti wrote:
> Hi,
>
> I have added routeirq to the kernel parameters:
>
> kernel /boot/vmlinuz-2.6.31.1 root=LABEL=ROOTFS_TEST ro noht
> mem=2048M memmap=1024M pci=routeirq
>
> When I insert your test module:
>
> fangorn:~/control/CHAMP/irqTest# insmod test_module.ko
>
> The trace is:
>
> rq_test: before request_irq
> irq_test: after request_irq (err = 0)
Great ! and did the "rtdm test module" behave well ?
Could you also send the kernel traces (with the debug messages we added).
> When I try the attach procedure:
>
> analogy_config analogy0 analogy_ni_pcimio
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:Oops: 0000 [#1] PREEMPT SMP
>
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:last sysfs file: /sys/class/net/lo/operstate
>
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:Process analogy_config (pid: 3556, ti=f6c48000 task=f790c730
> task.ti=f6c48000)
>
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:I-pipe domain Linux
>
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:Stack:
>
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:Call Trace:
>
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:Code: 8b 45 9c e8 f2 f1 fa ff 89 c2 83 f8 01 0f 85 d4 fe ff ff
> 8b 55 9c 8b 82 74 01 00 00 8b 00 f6 40 3c 06 0f 84 22 01 00 00 8b 42
> 18 <8b> 40 04 89 45 b0 8b 40 14 8b 40 04 85 c0 0f 84 0b 01 00 00 31
>
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:EIP: [<f8c7f029>] ni_E_init+0x267/0xff1 [analogy_ni_mio]
> SS:ESP 0068:f6c49dc8
>
> Message from sysl...@fangorn at Dec 15 07:39:25 ...
> kernel:CR2: 0000000000000004
>
> And the trace:
>
> a4l: analogy_ni_pcimio: pcimio_attach: found pci-6711 board
> mite 0000:04:01.0: PCI->APIC IRQ transform: INT A -> IRQ 48
> mite 0000:04:01.0: setting latency timer to 64
> a4l: MITE: 0xd0801000 mapped to f8e32000
> a4l: DAQ: 0xd0800000 mapped to f8e36000
> a4l: MITE: version = 1, type = 1, mite mode = 1, interface mode = 3
> a4l: MITE: num channels = 3, write post fifo depth = 1, wins = 0, iowins = 2
> a4l: analogy_ni_pcimio: pcimio_attach: found irq 48
> BUG: unable to handle kernel NULL pointer dereference at 00000004
> IP: [<f8c7f029>] ni_E_init+0x267/0xff1 [analogy_ni_mio]
> *pde = 00000000
> Oops: 0000 [#1] PREEMPT SMP
> last sysfs file: /sys/class/net/lo/operstate
> Modules linked in: test_module xeno_native analogy_ni_pcimio
> analogy_ni_mio analogy_ni_tio analogy_8255 analogy_ni_mite
> xeno_analogy xeno_rtdm astropci ext3 jbd mbcache ide_pci_generic
> ide_core ata_piix e1000 sata_mv libata unix [last unloaded:
> scsi_wait_scan]
>
> Pid: 3556, comm: analogy_config Not tainted (2.6.31.1 #1) X6DA8
> EIP: 0060:[<f8c7f029>] EFLAGS: 00010202 CPU: 1
> EIP is at ni_E_init+0x267/0xff1 [analogy_ni_mio]
> EAX: 00000000 EBX: f8a24280 ECX: f8c33e6c EDX: f8c33e60
> ESI: 00000000 EDI: f8c33e60 EBP: f6c49e38 ESP: f6c49dc8
> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> Process analogy_config (pid: 3556, ti=f6c48000 task=f790c730 task.ti=f6c48000)
> I-pipe domain Linux
> Stack:
> f6c49dd0 c10143ee f6c49dd8 f8c33e60 f6c49de0 c105ad27 f6c49dfc f8a10a5d
> <0> f8c2de00 00000000 00000001 f8c33e94 fffffff0 f6c49e14 f8c2e118 00000001
> <0> f8c30d0d f8c33e88 f8c33e60 f6c49e38 f8c2eccf 00000001 f8c33e60 00000030
> Call Trace:
> [<c10143ee>] ? unmask_IO_APIC_irq+0xd/0xf
> [<c105ad27>] ? xnintr_enable+0xb/0xd
> [<f8a10a5d>] ? rtdm_irq_request+0x48/0x5e [xeno_rtdm]
> [<f8c2de00>] ? a4l_handle_irq+0x0/0x1a [xeno_analogy]
> [<f8c2e118>] ? __a4l_request_irq+0x33/0x39 [xeno_analogy]
> [<f8c2eccf>] ? a4l_request_irq+0x98/0xaf [xeno_analogy]
> [<f8c8dd8a>] ? pcimio_attach+0x54d/0x664 [analogy_ni_pcimio]
> [<f8c2cfef>] ? a4l_assign_driver+0x61/0x134 [xeno_analogy]
> [<f8c2d2ba>] ? a4l_device_attach+0x54/0x6d [xeno_analogy]
> [<c106641a>] ? xnshadow_ppd_get+0x4f/0x58
> [<f8c2d54f>] ? a4l_ioctl_devcfg+0x57/0x104 [xeno_analogy]
> [<f8c2f36f>] ? a4l_rt_ioctl+0x33/0x3a [xeno_analogy]
> [<f8a0f3e6>] ? __rt_dev_ioctl+0xd1/0xd8 [xeno_rtdm]
> [<f8a11e77>] ? sys_rtdm_open+0x5c/0x64 [xeno_rtdm]
> [<f8a11dde>] ? sys_rtdm_ioctl+0x29/0x2b [xeno_rtdm]
> [<c1069ade>] ? losyscall_event+0xa9/0x190
> [<c10567fe>] ? __ipipe_dispatch_event+0xdf/0x201
> [<c1069a35>] ? losyscall_event+0x0/0x190
> [<c10167d1>] ? __ipipe_syscall_root+0x3b/0xc4
> [<c1002cfd>] ? system_call+0x2d/0x4f
> Code: 8b 45 9c e8 f2 f1 fa ff 89 c2 83 f8 01 0f 85 d4 fe ff ff 8b 55
> 9c 8b 82 74 01 00 00 8b 00 f6 40 3c 06 0f 84 22 01 00 00 8b 42 18 <8b>
> 40 04 89 45 b0 8b 40 14 8b 40 04 85 c0 0f 84 0b 01 00 00 31
> EIP: [<f8c7f029>] ni_E_init+0x267/0xff1 [analogy_ni_mio] SS:ESP 0068:f6c49dc8
> CR2: 0000000000000004
> ---[ end trace bcff6beb2ba30576 ]---
>
> Ettore
>
>
> 2009/12/2 Alexis Berlemont <berlemont.h...@free.fr>:
>> Hi,
>>
>> Ettore Pedretti wrote:
>>> Hi,
>> Sorry for the late reply.
>>
>>> I applied your kernel patch before applying the xenomai patch. When I
>>> insert the kernel patch I obtain:
>>>
>>> insmod: error inserting 'test_module.ko': -1 Function not implemented
>> Yes. request_irq returns an error because the io_apic did not register
>> the interrupt.
>>
>>> Attached is the content of dmesg from boot to module insertion.
>> Thanks to your traces and a look at the x86-specific pci code in the
>> kernel (arch/x86/pci), I think I understand the way it works.
>>
>> The fact that request_irq return -ENOSYS is normal: the irq is not
>> "enabled". In order to enable the pci card's irq, we have to enable the
>> pci device (thanks to a call to pci_enable()). This operation will route
>> the PCI interrupt line to an io_apic irq; after that, the io_apic will
>> register the irq. Once this procedure is complete, the irq is made
>> available for Linux.
>>
>> That is the reason why, our little Linux test module failed and our
>> little RTDM test module crashed.
>>
>> If you had the kernel boot argument "pci=routeirq", both test modules
>> should insmod fine because all pci interrupt are "enabled" during the
>> PCI discovery.
>>
>> Concerning the analogy driver, that does not explain the problem because
>> the pci board enabling is _supposed_ to be ok. Could you also test the
>> attach procedure with kernel boot argument specified above ?
>>
>>> Cheers
>>> -ep
>>>
>>> ps. I am leaving the mountain tomorrow and will be travelling until
>>> Friday. I hope I will be able to test the machine at distance without
>>> crashing it for good.
>>>
>>>
>>>
>>>
>>> 2009/11/29 Alexis Berlemont <berlemont.h...@free.fr>:
>>>> Hi,
>>>>
>>>> Ettore Pedretti wrote:
>>>>> 2009/11/26 Alexis Berlemont <berlemont.h...@free.fr>:
>>>>>> On Thu, Nov 26, 2009 at 9:22 AM, Ettore Pedretti <epedr...@gmail.com>
>>>>>> wrote:
>>>>>>> Hi Alexis,
>>>>>>>
>>>>>>> I applied the patch to my local git repository:
>>>>>>>
>>>>>>> fangorn:/usr/src#
>>>>>>> cd xenomai-head/
>>>>>>> fangorn:/usr/src/xenomai-head# git apply ../patch_debug_1.diff
>>>>>>> patch_debug_1.diff
>>>>>>> fangorn:/usr/src/xenomai-head# git apply ../patch_debug_1.diff
>>>>>>> ../patch_debug_1.diff:14: trailing whitespace.
>>>>>>> rtdm_printk("\t handler=%p, irq=%d, cookie=%p\n",
>>>>>>> warning: 1 line adds whitespace errors.
>>>>>>>
>>>>>>> Then created a debian package:
>>>>>>>
>>>>>>> git-buildpackage -us -uc -rfakeroot --git-debian-branch=master
>>>>>>> --git-upstream-branch=origin/master --git-ignore-new
>>>>>>>
>>>>>>> built a new kernel package:
>>>>>>>
>>>>>>> fakeroot make-kpkg --initrd --added-patches xenomai
>>>>>>> --revision=ipipeComedi.2.4.06 --config menuconfig binary-arch
>>>>>>>
>>>>>>> and installed the Debian package with dpkg -i
>>>>>>>
>>>>>>> This is what happens when i insert the module into the kernel:
>>>>>>>
>>>>>>> fangorn:~/control/CHAMP/irqTest# insmod irqTest.ko
>>>>>>> Killed
>>>>>>>
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:Oops: 0000 [#1] PREEMPT SMP
>>>>>>> fangorn:~/control/CHAMP/irqTest#
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:last sysfs file: /sys/class/net/lo/operstate
>>>>>>>
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:Process insmod (pid: 3566, ti=f6c02000 task=f78634b0
>>>>>>> task.ti=f6c02000)
>>>>>>>
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:I-pipe domain Linux
>>>>>>>
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:Stack:
>>>>>>>
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:Call Trace:
>>>>>>>
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:Code: Bad EIP value.
>>>>>>>
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:EIP: [<00000000>] 0x0 SS:ESP 0068:f6c03f18
>>>>>>>
>>>>>>> Message from sysl...@fangorn at Nov 26 00:09:52 ...
>>>>>>> kernel:CR2: 0000000000000000
>>>>>>>
>>>>>>> dmesg after insmod:
>>>>>>>
>>>>>>> irq_test: before rtdm_irq_request
>>>>>>> BUG: unable to handle kernel NULL pointer dereference at (null)
>>>>>>> IP: [<(null)>] (null)
>>>>>>> *pde = 00000000
>>>>>>> Oops: 0000 [#1] PREEMPT SMP
>>>>>>> last sysfs file: /sys/class/net/lo/operstate
>>>>>>> Modules linked in: irqTest(+) xeno_native analogy_ni_pcimio
>>>>>>> analogy_ni_mio analogy_ni_tio analogy_8255 analogy_ni_mite
>>>>>>> xeno_analogy xeno_rtdm astropci ext3 jbd mbcache ide_pci_generic
>>>>>>> ide_core ata_piix sata_mv e1000 libata unix [last unloaded:
>>>>>>> scsi_wait_scan]
>>>>>>>
>>>>>>> Pid: 3566, comm: insmod Not tainted (2.6.31.1 #1) X6DA8
>>>>>>> EIP: 0060:[<00000000>] EFLAGS: 00010246 CPU: 1
>>>>>>> EIP is at 0x0
>>>>>>> EAX: 00000030 EBX: 00000000 ECX: 00000030 EDX: c1250b80
>>>>>>> ESI: f8e24500 EDI: 00000000 EBP: f6c03f1c ESP: f6c03f18
>>>>>>> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
>>>>>>> Process insmod (pid: 3566, ti=f6c02000 task=f78634b0 task.ti=f6c02000)
>>>>>>> I-pipe domain Linux
>>>>>>> Stack:
>>>>>>> c1154166 f6c03f24 c105abf7 f6c03f40 f8a0ea5d f8e24000 00000000
>>>>>>> 00000000
>>>>>>> <0> f8e27000 00000000 f6c03f58 f8e2703e 00000000 f8e24066 00000000
>>>>>>> f8e27000
>>>>>>> <0> f6c03f84 c1001028 f8e243c0 00000001 fffffffc f8e243c0 00000000
>>>>>>> f6c03f84
>>>>>>> Call Trace:
>>>>>>> [<c1154166>] ? rthal_irq_enable+0x2d/0x31
>>>>>>> [<c105abf7>] ? xnintr_enable+0xb/0xd
>>>>>>> [<f8a0ea5d>] ? rtdm_irq_request+0x48/0x5e [xeno_rtdm]
>>>>>>> [<f8e24000>] ? test_handler+0x0/0x1c [irqTest]
>>>>>>> [<f8e27000>] ? __test_init+0x0/0x7e [irqTest]
>>>>>>> [<f8e2703e>] ? __test_init+0x3e/0x7e [irqTest]
>>>>>>> [<f8e27000>] ? __test_init+0x0/0x7e [irqTest]
>>>>>>> [<c1001028>] ? do_one_initcall+0x23/0x183
>>>>>>> [<c103a825>] ? blocking_notifier_call_chain+0x1a/0x1c
>>>>>>> [<c10481e9>] ? sys_init_module+0xad/0x1ec
>>>>>>> [<c1092cc5>] ? sys_close+0x71/0xb5
>>>>>>> [<c1002c25>] ? sysenter_do_call+0x12/0x16
>>>>>>> Code: Bad EIP value.
>>>>>>> EIP: [<00000000>] 0x0 SS:ESP 0068:f6c03f18
>>>>>>> CR2: 0000000000000000
>>>>>>> ---[ end trace ac2616367ecf94b2 ]---
>>>>>>>
>>>>>>> I hope this is what you wanted me to try. Please let me know.
>>>>>> So if I understand well, you "insmoded" the little test module which
>>>>>> does nothing but calling rtdm_irq_request() and the NULL pointer bug
>>>>>> occured.
>>>>> Correct
>>>>>
>>>>>> This bug occurred before calling analogy_config, you did not tried to
>>>>>> attach the ni_pcimio driver, right ?
>>>>> I insmod-ed the test module that gave that error dump. I later tried
>>>>> to attach the driver which causes the usual error. The stack-dumps I
>>>>> sent are solely related to insmod of test program.
>>>>>
>>>>>> If I am right, it seems like the bug is not located in analogy but
>>>>>> between Xenomai's nucleus and Ipipe, which is ... weird.
>>>>>>
>>>>>> What is your kernel configuration ? no IO_APIC ?
>>>>> I put back my config to IO_APIC. Should I disable that again?
>>>>> attached is my kernel configuration (configAnalogy)
>>>>>
>>>>>
>>>>>> Which irq did you try to request ? 48 or 5 ?
>>>>> I do not know. do I have to pass parameters to insmod?
>>>>>
>>>>> This is my /proc/interrupts if that is helpful
>>>>> CPU0 CPU1
>>>>> 0: 222 0 IO-APIC-edge timer
>>>>> 1: 0 9 IO-APIC-edge i8042
>>>>> 2: 0 0 XT-PIC-XT cascade
>>>>> 12: 0 132 IO-APIC-edge i8042
>>>>> 14: 0 8 IO-APIC-edge ata_piix
>>>>> 15: 0 12358 IO-APIC-edge ata_piix
>>>>> 20: 0 0 IO-APIC-fasteoi astropci0
>>>>> 28: 0 235 IO-APIC-fasteoi sata_mv
>>>>> 54: 0 77950 IO-APIC-fasteoi eth0
>>>>> NMI: 0 0 Non-maskable interrupts
>>>>> LOC: 45365307 45365133 Local timer interrupts
>>>>> SPU: 0 0 Spurious interrupts
>>>>> CNT: 0 0 Performance counter interrupts
>>>>> PND: 0 0 Performance pending work
>>>>> RES: 2555 2212 Rescheduling interrupts
>>>>> CAL: 60 58 Function call interrupts
>>>>> TLB: 419 200 TLB shootdowns
>>>>> TRM: 0 0 Thermal event interrupts
>>>>> THR: 0 0 Threshold APIC interrupts
>>>>> MCE: 0 0 Machine check exceptions
>>>>> MCP: 152 152 Machine check polls
>>>>> ERR: 0
>>>>> MIS: 0
>>>>>
>>>>> and my /proc/xenomai/irq
>>>>>
>>>>> IRQ CPU0 CPU1
>>>>> 516: 0 0 [IPI]
>>>>> 519: 46161773 46161772 [timer]
>>>>> 520: 0 0 [critical sync]
>>>>> 546: 0 0 [virtual]
>>>>>
>>>>>
>>>>>> Which CPU are you using ?
>>>>> CPU0: Intel(R) Xeon(TM) CPU 3.00GHz stepping 03
>>>>> CPU1: Intel(R) Xeon(TM) CPU 3.00GHz stepping 03
>>>>>
>>>>> As Philippe rightly pointed out this is a 32-bit install although the
>>>>> CPUs are 64 bit
>>>> Following Philippe's advice, I attached a little patch for your kernel
>>>> sources. Could you apply it and send the kernel log messages ?
>>>>
>>>> You will also find attached the sources of a little module which calls
>>>> Linux' request_irq(48). Could you insmod the module and send a dump of
>>>> /proc/interrupts ?
>>>>
>>>>>> Thank you for your time.
>>>>>>
>>>>>>> Cheers
>>>>>>> Ettore
>>>>>>>
>>>>>>>
>>>>>>> 2009/11/24 Alexis Berlemont <berlemont.h...@free.fr>:
>>>>>>>> On Tuesday 24 November 2009 22:34:33 Ettore Pedretti wrote:
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> Would it help at this stage if I re-enable IO APIC, run your program
>>>>>>>>> and send you the call-stack dump? I am willing to test your patch on
>>>>>>>>> our hardware as soon as you got one ready, if that can be of help.
>>>>>>>> Sorry, I did not answer your question. The bug occurs in both
>>>>>>>> configurations;
>>>>>>>> so, do not bother changing your configuration for the moment.
>>>>>>>>
>>>>>>>>> Cheers
>>>>>>>>> Ettore
>>>>>>>>>
>>>>>>>>> 2009/11/23 Alexis Berlemont <berlemont.h...@free.fr>:
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> On Monday 23 November 2009 18:26:15 Ettore Pedretti wrote:
>>>>>>>>>>> Hi,
>>>>>>>>>>>
>>>>>>>>>>> It is finally working. here is the dmesg after I insert a module:
>>>>>>>>>>>
>>>>>>>>>>> irq_test: before rtdm_irq_request
>>>>>>>>>>> irq_test: after rtdm_irq_request (err = -22)
>>>>>>>>>>> irq_test: before rtdm_irq_enable
>>>>>>>>>>> irq_test: after rtdm_irq_enable (err = -22)
>>>>>>>>>> rtdm_irq_request() returns -EINVAL because the IO APIC is disabled.
>>>>>>>>>> So,
>>>>>>>>>> the irq 48 turns into the irq 5;
>>>>>>>>>>
>>>>>>>>>>> Attached are a complete call-stack dump and my present kernel
>>>>>>>>>>> configuration.
>>>>>>>>>> With the fact that there is still a NULL pointer bug without IO
>>>>>>>>>> APIC,
>>>>>>>>>> the
>>>>>>>>>> bug is bound to be located in analogy. There may be some wrong
>>>>>>>>>> write
>>>>>>>>>> access on the interrupt structure.
>>>>>>>>>>
>>>>>>>>>> I will come back with a patch which dumps the structure's content
>>>>>>>>>> at
>>>>>>>>>> various locations in the attach code.
>>>>>>>>>>
>>>>>>>>>>> Cheers
>>>>>>>>>>> Ettore
>>>>>>>>>>>
>>>>>>>>>>> 2009/11/23 Alexis Berlemont <berlemont.h...@free.fr>:
>>>>>>>>>>>> Hi,
>>>>>>>>>>>>
>>>>>>>>>>>> On Mon, Nov 23, 2009 at 9:28 AM, Ettore Pedretti
>>>>>>>>>>>> <e...@st-and.ac.uk>
>>>>>>>>>> wrote:
>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>
>>>>>>>>>>>>> I have compiled the module using this makefile:
>>>>>>>>>>>>>
>>>>>>>>>>>>> prefix := $(shell /usr/bin/xeno-config --prefix)
>>>>>>>>>>>>> obj-m := irqTest.o
>>>>>>>>>>>>>
>>>>>>>>>>>>> ifeq ($(prefix),)
>>>>>>>>>>>>> $(error Please add <xeno-install>/bin to your PATH variable)
>>>>>>>>>>>>> endif
>>>>>>>>>>>>>
>>>>>>>>>>>>> KDIR := /lib/modules/$(shell uname -r)/build
>>>>>>>>>>>>> PWD := $(shell pwd)
>>>>>>>>>>>>> EXTRA_CFLAGS := -I/usr/include/xenomai -I/usr/include/
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> all: default
>>>>>>>>>>>>>
>>>>>>>>>>>>> default:
>>>>>>>>>>>>> $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
>>>>>>>>>>>>>
>>>>>>>>>>>>> install:
>>>>>>>>>>>>> $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules_install
>>>>>>>>>>>>>
>>>>>>>>>>>>> clean:
>>>>>>>>>>>>> rm -fr *.mod.c *.o *.ko irqTest *~ .irqTest* .tmp_versions
>>>>>>>>>>>>>
>>>>>>>>>>>>> The module seems to compiles fine:
>>>>>>>>>>>>>
>>>>>>>>>>>>> make -C /lib/modules/2.6.31.1/build
>>>>>>>>>>>>> SUBDIRS=/home/ep41/control/CHAMP/irqTest modules
>>>>>>>>>>>>> make[1]: Entering directory `/usr/src/linux-2.6.31.1'
>>>>>>>>>>>>> CC [M] /home/ep41/control/CHAMP/irqTest/irqTest.o
>>>>>>>>>>>>> Building modules, stage 2.
>>>>>>>>>>>>> MODPOST 1 modules
>>>>>>>>>>>>> CC /home/ep41/control/CHAMP/irqTest/irqTest.mod.o
>>>>>>>>>>>>> LD [M] /home/ep41/control/CHAMP/irqTest/irqTest.ko
>>>>>>>>>>>>> make[1]: Leaving directory `/usr/src/linux-2.6.31.1'
>>>>>>>>>>>>>
>>>>>>>>>>>>> To make sure module dependencies are in place I modprobe
>>>>>>>>>>>>> irqbench
>>>>>>>>>>>>> (probably not necessary).
>>>>>>>>>>>>>
>>>>>>>>>>>>> modprobe xeno_irqbench
>>>>>>>>>>>>>
>>>>>>>>>>>>> All the loaded modules:
>>>>>>>>>>>>>
>>>>>>>>>>>>> fangorn:~# lsmod
>>>>>>>>>>>>> Module Size Used by
>>>>>>>>>>>>> xeno_irqbench 5152 0
>>>>>>>>>>>>> xeno_native 83296 0
>>>>>>>>>>>>> analogy_ni_pcimio 15676 0
>>>>>>>>>>>>> analogy_ni_mio 41596 1 analogy_ni_pcimio
>>>>>>>>>>>>> analogy_ni_tio 21724 1 analogy_ni_mio
>>>>>>>>>>>>> analogy_8255 4060 1 analogy_ni_mio
>>>>>>>>>>>>> analogy_ni_mite 9980 3
>>>>>>>>>>>>> analogy_ni_pcimio,analogy_ni_mio,analogy_ni_tio xeno_analogy
>>>>>>>>>>>>> 38876 5
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> analogy_ni_pcimio,analogy_ni_mio,analogy_ni_tio,analogy_8255,analogy_
>>>>>>>>>>>>> ni_ mite xeno_rtdm 24244 3
>>>>>>>>>>>>> xeno_irqbench,analogy_ni_mio,xeno_analogy astropci
>>>>>>>>>>>>> 10968 0
>>>>>>>>>>>>> ext3 112900 1
>>>>>>>>>>>>> jbd 44016 1 ext3
>>>>>>>>>>>>> mbcache 6652 1 ext3
>>>>>>>>>>>>> ide_pci_generic 3712 0
>>>>>>>>>>>>> ide_core 79388 1 ide_pci_generic
>>>>>>>>>>>>> e1000 118204 0
>>>>>>>>>>>>> ata_piix 15968 2
>>>>>>>>>>>>> sata_mv 27632 0
>>>>>>>>>>>>> libata 151468 2 ata_piix,sata_mv
>>>>>>>>>>>>> unix 24460 10
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> When I insert the module it complains about missing symbols:
>>>>>>>>>>>>>
>>>>>>>>>>>>> insmod irqTest.ko
>>>>>>>>>>>>>
>>>>>>>>>>>>> insmod: error inserting 'irqTest.ko': -1 Unknown symbol in
>>>>>>>>>>>>> module
>>>>>>>>>>>>>
>>>>>>>>>>>>> dmesg:
>>>>>>>>>>>>>
>>>>>>>>>>>>> irqTest: module license 'unspecified' taints kernel.
>>>>>>>>>>>>> Disabling lock debugging due to kernel taint
>>>>>>>>>>>>> irqTest: Unknown symbol xnintr_enable
>>>>>>>>>>>>> irqTest: Unknown symbol xnintr_detach
>>>>>>>>>>>>>
>>>>>>>>>>>>> What am I doing wrong?
>>>>>>>>>>>> It's me who did wrong. I just tested the compilation inside the
>>>>>>>>>>>> kernel.
>>>>>>>>>>>>
>>>>>>>>>>>> xnintr_* symbols are only exported for GPL compliant modules. So,
>>>>>>>>>>>> could you add the following line in the test module:
>>>>>>>>>>>> MODULE_LICENSE("GPL");
>>>>>>>>>>>>
>>>>>>>>>>>> With that, the insmod operation should work.
>>>>>>>>>>>>
>>>>>>>>>>>>> BTW, I disabled CONFIG_X86_IO_APIC and the SMP option: same
>>>>>>>>>>>>> problem.
>>>>>>>>>>>> Could you send the call-stack dump ? Maybe, that will unveil a
>>>>>>>>>>>> clue.
>>>>>>>>>>>>
>>>>>>>>>>>>> Cheers
>>>>>>>>>>>>> Ettore
>>>>>>>>>>>>>
>>>>>>>>>>>>> 2009/11/22 Alexis Berlemont <alexis.berlem...@gmail.com>:
>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Sunday 22 November 2009 20:35:51 Ettore Pedretti wrote:
>>>>>>>>>>>>>>> Hello,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I downloaded Xenomai 2.5-rc4 from the xenomai-head.git. I need
>>>>>>>>>>>>>>> to
>>>>>>>>>>>>>>> use the comedi drivers for Xenomai for a NI PCI-6711 function
>>>>>>>>>>>>>>> generator board.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> When I try to use the test program cmd_write (or cmd-read) I
>>>>>>>>>>>>>>> obtain
>>>>>>>>>>>>>>> the following:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> fangorn:~# cmd_write -vcmd_write: device analogy0 opened
>>>>>>>>>>>>>>> (fd=0)
>>>>>>>>>>>>>>> cmd_write: basic descriptor retrieved
>>>>>>>>>>>>>>> subdevices count = 0
>>>>>>>>>>>>>>> read subdevice index = 0
>>>>>>>>>>>>>>> write subdevice index = 0
>>>>>>>>>>>>>>> cmd_write: a4l_get_desc failed (ret=-22)
>>>>>>>>>>>>>>> *** glibc detected *** cmd_write: free(): invalid next size
>>>>>>>>>>>>>>> (fast):
>>>>>>>>>>>>>>> 0x0804d008 ***
>>>>>>>>>>>>>>> ======= Backtrace: =========
>>>>>>>>>>>>>>> /lib/i686/cmov/libc.so.6[0xb7e52624]
>>>>>>>>>>>>>>> /lib/i686/cmov/libc.so.6(cfree+0x96)[0xb7e54826]
>>>>>>>>>>>>>>> cmd_write[0x804927c]
>>>>>>>>>>>>>>> /lib/i686/cmov/libc.so.6(__libc_start_main+0xe5)[0xb7dfa455]
>>>>>>>>>>>>>>> cmd_write[0x8048b01]
>>>>>>>>>>>>>>> ======= Memory map: ========
>>>>>>>>>>>>>>> 08048000-0804a000 r-xp 00000000 08:01 10855303
>>>>>>>>>>>>>>> /usr/bin/cmd_write
>>>>>>>>>>>>>>> 0804a000-0804b000 rw-p 00002000 08:01 10855303
>>>>>>>>>>>>>>> /usr/bin/cmd_write
>>>>>>>>>>>>>>> 0804b000-0806e000 rw-p 00000000 00:00 0 [heap]
>>>>>>>>>>>>>>> b7c00000-b7c21000 rw-p 00000000 00:00 0
>>>>>>>>>>>>>>> b7c21000-b7d00000 ---p 00000000 00:00 0
>>>>>>>>>>>>>>> b7dce000-b7dda000 r-xp 00000000 08:01 6127619
>>>>>>>>>>>>>>> /lib/libgcc_s.so.1
>>>>>>>>>>>>>>> b7dda000-b7ddb000 rw-p 0000b000 08:01 6127619
>>>>>>>>>>>>>>> /lib/libgcc_s.so.1
>>>>>>>>>>>>>>> b7de0000-b7de3000 rw-s 00000000 00:0b 426 /dev/rtheap
>>>>>>>>>>>>>>> b7de3000-b7de4000 rw-p 00000000 00:00 0
>>>>>>>>>>>>>>> b7de4000-b7f39000 r-xp 00000000 08:01 6144250
>>>>>>>>>>>>>>> /lib/i686/cmov/libc-2.7.so b7f39000-b7f3a000 r--p 00155000
>>>>>>>>>>>>>>> 08:01
>>>>>>>>>>>>>>> 6144250 /lib/i686/cmov/libc-2.7.so b7f3a000-b7f3c000 rw-p
>>>>>>>>>>>>>>> 00156000 08:01 6144250 /lib/i686/cmov/libc-2.7.so
>>>>>>>>>>>>>>> b7f3c000-b7f3f000 rw-p 00000000 00:00 0
>>>>>>>>>>>>>>> b7f3f000-b7f54000 r-xp 00000000 08:01 6144264
>>>>>>>>>>>>>>> /lib/i686/cmov/libpthread-2.7.so
>>>>>>>>>>>>>>> b7f54000-b7f56000 rw-p 00014000 08:01 6144264
>>>>>>>>>>>>>>> /lib/i686/cmov/libpthread-2.7.so
>>>>>>>>>>>>>>> b7f56000-b7f58000 rw-p 00000000 00:00 0
>>>>>>>>>>>>>>> b7f58000-b7f5a000 r-xp 00000000 08:01 10808118
>>>>>>>>>>>>>>> /usr/lib/librtdm.so.1.0.0 b7f5a000-b7f5b000 rw-p 00001000
>>>>>>>>>>>>>>> 08:01
>>>>>>>>>>>>>>> 10808118 /usr/lib/librtdm.so.1.0.0 b7f5b000-b7f5c000 rw-p
>>>>>>>>>>>>>>> 00000000 00:00 0
>>>>>>>>>>>>>>> b7f5c000-b7f63000 r-xp 00000000 08:01 10808119
>>>>>>>>>>>>>>> /usr/lib/libnative.so.3.0.0 b7f63000-b7f64000 rw-p 00006000
>>>>>>>>>>>>>>> 08:01
>>>>>>>>>>>>>>> 10808119 /usr/lib/libnative.so.3.0.0 b7f64000-b7f67000 r-xp
>>>>>>>>>>>>>>> 00000000 08:01 10808112 /usr/lib/libanalogy.so.1.0.0
>>>>>>>>>>>>>>> b7f67000-b7f68000 rw-p 00002000 08:01 10808112
>>>>>>>>>>>>>>> /usr/lib/libanalogy.so.1.0.0
>>>>>>>>>>>>>>> b7f69000-b7f6a000 rw-p 00000000 00:00 0
>>>>>>>>>>>>>>> b7f6a000-b7f6d000 rw-s 00000000 00:0b 426 /dev/rtheap
>>>>>>>>>>>>>>> b7f6d000-b7f6f000 rw-p 00000000 00:00 0
>>>>>>>>>>>>>>> b7f6f000-b7f89000 r-xp 00000000 08:01 6127618
>>>>>>>>>>>>>>> /lib/ld-2.7.so
>>>>>>>>>>>>>>> b7f89000-b7f8b000 rw-p 0001a000 08:01 6127618
>>>>>>>>>>>>>>> /lib/ld-2.7.so
>>>>>>>>>>>>>>> bfab1000-bfac6000 rw-p 00000000 00:00 0 [stack]
>>>>>>>>>>>>>>> ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]
>>>>>>>>>>>>>>> Aborted
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> This is probably because the device /dev/analogy0 does not
>>>>>>>>>>>>>>> exist.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> This is the output of uname -a
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Linux fangorn 2.6.31.1 #1 SMP PREEMPT Fri Nov 20 20:42:26 PST
>>>>>>>>>>>>>>> 2009
>>>>>>>>>>>>>>> i686 GNU/Linux
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> And these are the relevant entries in dmesg
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> dmesg:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I-pipe 2.4-06: pipeline enabled.
>>>>>>>>>>>>>>> I-pipe: Domain Xenomai registered.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Xenomai: hal/i386 started.
>>>>>>>>>>>>>>> Xenomai: scheduling class idle registered.
>>>>>>>>>>>>>>> Xenomai: scheduling class rt registered.
>>>>>>>>>>>>>>> Xenomai: real-time nucleus v2.5-rc4 (Flying In A Blue Dream)
>>>>>>>>>>>>>>> loaded. Xenomai: SMI-enabled chipset found
>>>>>>>>>>>>>>> Xenomai: SMI workaround enabled
>>>>>>>>>>>>>>> Xenomai: starting RTDM services.
>>>>>>>>>>>>>>> Xenomai: starting native API services.
>>>>>>>>>>>>>>> Analogy: MITE: Available NI device IDs: 0x1880
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> result of lspci for the relevant board:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 04:01.0 Class ff00: National Instruments PCI-6711
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> And lsmod:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Module Size Used by
>>>>>>>>>>>>>>> xeno_native 105088 0
>>>>>>>>>>>>>>> analogy_ni_pcimio 15644 0
>>>>>>>>>>>>>>> analogy_ni_mio 44860 1 analogy_ni_pcimio
>>>>>>>>>>>>>>> analogy_ni_tio 24956 1 analogy_ni_mio
>>>>>>>>>>>>>>> analogy_8255 3900 1 analogy_ni_mio
>>>>>>>>>>>>>>> analogy_ni_mite 10140 3
>>>>>>>>>>>>>>> analogy_ni_pcimio,analogy_ni_mio,analogy_ni_tio xeno_analogy
>>>>>>>>>>>>>>> 40220 5
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> analogy_ni_pcimio,analogy_ni_mio,analogy_ni_tio,analogy_8255,analog
>>>>>>>>>>>>>>> y_n i_mit e xeno_rtdm 28436 2
>>>>>>>>>>>>>>> analogy_ni_mio,xeno_analogy astropci 10944 0
>>>>>>>>>>>>>>> ext3 109636 1
>>>>>>>>>>>>>>> jbd 43920 1 ext3
>>>>>>>>>>>>>>> mbcache 6272 1 ext3
>>>>>>>>>>>>>>> ide_pci_generic 3712 0
>>>>>>>>>>>>>>> ide_core 74204 1 ide_pci_generic
>>>>>>>>>>>>>>> ata_piix 15748 2
>>>>>>>>>>>>>>> sata_mv 26448 0
>>>>>>>>>>>>>>> e1000 114208 0
>>>>>>>>>>>>>>> libata 142156 2 ata_piix,sata_mv
>>>>>>>>>>>>>>> unix 22992 10
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> According to this post:
>>>>>>>>>>>>>>> http://www.mail-archive.com/xenomai-help@gna.org/msg09595.html
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> The analogy driver "a4l_pcimio" will be registered with your
>>>>>>>>>>>>>>>> last
>>>>>>>>>>>>>>>> insmod (analogy_ni_pcimio). You can check that by typing "cat
>>>>>>>>>>>>>>>> /proc/analogy/drivers", you will see only one entry:
>>>>>>>>>>>>>>>> a4l_pcimio.
>>>>>>>>>>>>>>> fangorn:~# cat /proc/analogy/drivers
>>>>>>>>>>>>>>> -- Analogy drivers --
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> | idx | driver name
>>>>>>>>>>>>>>> | 00 | analogy_ni_pcimio
>>>>>>>>>>>>>>> | 01 | analogy_8255
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> There are two entries and the drivers are not attached:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> fangorn:~# cat /proc/analogy/devices
>>>>>>>>>>>>>>> -- Analogy devices --
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> | idx | status | driver
>>>>>>>>>>>>>>> | 00 | Unused | No driver
>>>>>>>>>>>>>>> | 01 | Unused | No driver
>>>>>>>>>>>>>>> | 02 | Unused | No driver
>>>>>>>>>>>>>>> | 03 | Unused | No driver
>>>>>>>>>>>>>>> | 04 | Unused | No driver
>>>>>>>>>>>>>>> | 05 | Unused | No driver
>>>>>>>>>>>>>>> | 06 | Unused | No driver
>>>>>>>>>>>>>>> | 07 | Unused | No driver
>>>>>>>>>>>>>>> | 08 | Unused | No driver
>>>>>>>>>>>>>>> | 09 | Unused | No driver
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I'm aware of the name change of the drivers:
>>>>>>>>>>>>>>> http://www.mail-archive.com/xenomai-...@gna.org/msg00741.html
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> - a4l_pcimio becomes analogy_ni_pcimio
>>>>>>>>>>>>>>>> - 8255 becomes analogy_8255.
>>>>>>>>>>>>>>>> Consequently, the command line to attach these drivers has
>>>>>>>>>>>>>>>> changed. Starting from now, we have to type:
>>>>>>>>>>>>>>>> - analogy_config analogyX analogy_ni_pcimio (instead of
>>>>>>>>>>>>>>>> a4l_pcimio)
>>>>>>>>>>>>>>> This is what happens when I try to attach the driver to de
>>>>>>>>>>>>>>> device:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> fangorn:~# analogy_config analogy0 analogy_ni_pcimio
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:Oops: 0000 [#1] PREEMPT SMP
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:last sysfs file:
>>>>>>>>>>>>>>> /sys/devices/pci0000:00/0000:00:1e.0/0000:06:02.0/class
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:Process analogy_config (pid: 3409, ti=f64cc000
>>>>>>>>>>>>>>> task=f79013b0 task.ti=f64cc000)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:I-pipe domain Linux
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:Stack:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:Call Trace:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:Code: 8b 45 9c e8 f2 f1 fa ff 89 c2 83 f8 01 0f 85 d4
>>>>>>>>>>>>>>> fe
>>>>>>>>>>>>>>> ff
>>>>>>>>>>>>>>> ff 8b 55 9c 8b 82 74 01 00 00 8b 00 f6 40 3c 06 0f 84 22 01 00
>>>>>>>>>>>>>>> 00
>>>>>>>>>>>>>>> 8b 42 18 <8b> 40 04 89 45 b0 8b 40 14 8b 40 04 85 c0 0f 84 0b
>>>>>>>>>>>>>>> 01
>>>>>>>>>>>>>>> 00
>>>>>>>>>>>>>>> 00 31
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:EIP: [<f8c7d029>] ni_E_init+0x267/0xff1
>>>>>>>>>>>>>>> [analogy_ni_mio]
>>>>>>>>>>>>>>> SS:ESP 0068:f64cddc8
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Message from sysl...@fangorn at Nov 21 23:22:37 ...
>>>>>>>>>>>>>>> kernel:CR2: 0000000000000004
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> relevant dmeg:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> a4l: analogy_ni_pcimio: pcimio_attach: found pci-6711 board
>>>>>>>>>>>>>>> mite 0000:04:01.0: PCI->APIC IRQ transform: INT A -> IRQ 48
>>>>>>>>>>>>>>> mite 0000:04:01.0: setting latency timer to 64
>>>>>>>>>>>>>>> a4l: MITE: 0xd0801000 mapped to f8e26000
>>>>>>>>>>>>>>> a4l: DAQ: 0xd0800000 mapped to f8e2a000
>>>>>>>>>>>>>>> a4l: MITE: version = 1, type = 1, mite mode = 1, interface
>>>>>>>>>>>>>>> mode
>>>>>>>>>>>>>>> = 3
>>>>>>>>>>>>>>> a4l: MITE: num channels = 3, write post fifo depth = 1, wins =
>>>>>>>>>>>>>>> 0,
>>>>>>>>>>>>>>> iowins = 2 a4l: analogy_ni_pcimio: pcimio_attach: found irq 48
>>>>>>>>>>>>>>> BUG: unable to handle kernel NULL pointer dereference at
>>>>>>>>>>>>>>> 00000004
>>>>>>>>>>>>>>> IP: [<f8c7d029>] ni_E_init+0x267/0xff1 [analogy_ni_mio]
>>>>>>>>>>>>>>> *pde = 00000000
>>>>>>>>>>>>>>> Oops: 0000 [#1] PREEMPT SMP
>>>>>>>>>>>>>>> last sysfs file:
>>>>>>>>>>>>>>> /sys/devices/pci0000:00/0000:00:1e.0/0000:06:02.0/class
>>>>>>>>>>>>>>> Modules
>>>>>>>>>>>>>>> linked in: xeno_native analogy_ni_pcimio analogy_ni_mio
>>>>>>>>>>>>>>> analogy_ni_tio analogy_8255 analogy_ni_mite xeno_analogy
>>>>>>>>>>>>>>> xeno_rtdm
>>>>>>>>>>>>>>> astropci ext3 jbd mbcache ide_pci_generic ide_core ata_piix
>>>>>>>>>>>>>>> sata_mv
>>>>>>>>>>>>>>> e1000 libata unix [last unloaded: scsi_wait_scan]
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Pid: 3409, comm: analogy_config Not tainted (2.6.31.1 #1)
>>>>>>>>>>>>>>> X6DA8
>>>>>>>>>>>>>>> EIP: 0060:[<f8c7d029>] EFLAGS: 00010202 CPU: 1
>>>>>>>>>>>>>>> EIP is at ni_E_init+0x267/0xff1 [analogy_ni_mio]
>>>>>>>>>>>>>>> EAX: 00000000 EBX: f8a22280 ECX: f8c31e6c EDX: f8c31e60
>>>>>>>>>>>>>>> ESI: 00000000 EDI: f8c31e60 EBP: f64cde38 ESP: f64cddc8
>>>>>>>>>>>>>>> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
>>>>>>>>>>>>>>> Process analogy_config (pid: 3409, ti=f64cc000 task=f79013b0
>>>>>>>>>>>>>>> task.ti=f64cc000) I-pipe domain Linux
>>>>>>>>>>>>>>> Stack:
>>>>>>>>>>>>>>> f64cddd0 c10142b6 f64cddd8 f8c31e60 f64cdde0 c105abf7
>>>>>>>>>>>>>>> f64cddfc
>>>>>>>>>>>>>>> f8a0ea5d <0> f8c2be00 00000000 00000001 f8c31e94 fffffff0
>>>>>>>>>>>>>>> f64cde14
>>>>>>>>>>>>>>> f8c2c118 00000001 <0> f8c2ed0d f8c31e88 f8c31e60 f64cde38
>>>>>>>>>>>>>>> f8c2cccf
>>>>>>>>>>>>>>> 00000001 f8c31e60 00000030 Call Trace:
>>>>>>>>>>>>>>> [<c10142b6>] ? unmask_IO_APIC_irq+0xd/0xf
>>>>>>>>>>>>>>> [<c105abf7>] ? xnintr_enable+0xb/0xd
>>>>>>>>>>>>>>> [<f8a0ea5d>] ? rtdm_irq_request+0x48/0x5e [xeno_rtdm]
>>>>>>>>>>>>>>> [<f8c2be00>] ? a4l_handle_irq+0x0/0x1a [xeno_analogy]
>>>>>>>>>>>>>>> [<f8c2c118>] ? __a4l_request_irq+0x33/0x39 [xeno_analogy]
>>>>>>>>>>>>>>> [<f8c2cccf>] ? a4l_request_irq+0x98/0xaf [xeno_analogy]
>>>>>>>>>>>>>>> [<f8c8bd8a>] ? pcimio_attach+0x54d/0x664 [analogy_ni_pcimio]
>>>>>>>>>>>>>>> [<f8c2afef>] ? a4l_assign_driver+0x61/0x134 [xeno_analogy]
>>>>>>>>>>>>>>> [<f8c2b2ba>] ? a4l_device_attach+0x54/0x6d [xeno_analogy]
>>>>>>>>>>>>>>> [<c10662ea>] ? xnshadow_ppd_get+0x4f/0x58
>>>>>>>>>>>>>>> [<f8c2b54f>] ? a4l_ioctl_devcfg+0x57/0x104 [xeno_analogy]
>>>>>>>>>>>>>>> [<f8c2d36f>] ? a4l_rt_ioctl+0x33/0x3a [xeno_analogy]
>>>>>>>>>>>>>>> [<f8a0d3e6>] ? __rt_dev_ioctl+0xd1/0xd8 [xeno_rtdm]
>>>>>>>>>>>>>>> [<f8a0fe77>] ? sys_rtdm_open+0x5c/0x64 [xeno_rtdm]
>>>>>>>>>>>>>>> [<f8a0fdde>] ? sys_rtdm_ioctl+0x29/0x2b [xeno_rtdm]
>>>>>>>>>>>>>>> [<c10699ae>] ? losyscall_event+0xa9/0x190
>>>>>>>>>>>>>>> [<c10566ce>] ? __ipipe_dispatch_event+0xdf/0x201
>>>>>>>>>>>>>>> [<c1069905>] ? losyscall_event+0x0/0x190
>>>>>>>>>>>>>>> [<c10166a1>] ? __ipipe_syscall_root+0x3b/0xc4
>>>>>>>>>>>>>>> [<c1002cfd>] ? system_call+0x2d/0x4f
>>>>>>>>>>>>>>> Code: 8b 45 9c e8 f2 f1 fa ff 89 c2 83 f8 01 0f 85 d4 fe ff ff
>>>>>>>>>>>>>>> 8b
>>>>>>>>>>>>>>> 55 9c 8b 82 74 01 00 00 8b 00 f6 40 3c 06 0f 84 22 01 00 00 8b
>>>>>>>>>>>>>>> 42
>>>>>>>>>>>>>>> 18 <8b> 40 04 89 45 b0 8b 40 14 8b 40 04 85 c0 0f 84 0b 01 00
>>>>>>>>>>>>>>> 00
>>>>>>>>>>>>>>> 31
>>>>>>>>>>>>>>> EIP: [<f8c7d029>] ni_E_init+0x267/0xff1 [analogy_ni_mio]
>>>>>>>>>>>>>>> SS:ESP
>>>>>>>>>>>>>>> 0068:f64cddc8 CR2: 0000000000000004
>>>>>>>>>>>>>>> ---[ end trace c887d49bb5e86cf4 ]---
>>>>>>>>>>>>>> Thanks for such a great report.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> I keep two things in mind:
>>>>>>>>>>>>>> - cmd_write's error handling path is not buggy (that was
>>>>>>>>>>>>>> already
>>>>>>>>>>>>>> in
>>>>>>>>>>>>>> my todo list). I will fix that as soon as possible.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> - according to the call-stack dump you made, the irq handler
>>>>>>>>>>>>>> registering seems to be the source of the trouble. What strikes
>>>>>>>>>>>>>> me
>>>>>>>>>>>>>> is that the oops occurred very low (unmask_IO_APIC_irq: we are
>>>>>>>>>>>>>> no
>>>>>>>>>>>>>> more in the analogy layer).
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> In order to be sure that the problem is located in analogy, it
>>>>>>>>>>>>>> would
>>>>>>>>>>>>>> be great to test that calling rtdm_request_irq(... , 48, ...)
>>>>>>>>>>>>>> does
>>>>>>>>>>>>>> not trigger the bug.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Here is a little test module you could try to insmod. If you do
>>>>>>>>>>>>>> not
>>>>>>>>>>>>>> want to bother finding out how to compile it, you can replace
>>>>>>>>>>>>>> the
>>>>>>>>>>>>>> code of an existing rtdm driver (for example:
>>>>>>>>>>>>>> xenomai/ksrc/drivers/testing/irqbench.c) with the source below.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Another interesting test would be to disable CONFIG_X86_IO_APIC
>>>>>>>>>>>>>> in
>>>>>>>>>>>>>> your kernel configuration (in "Processor type and features",
>>>>>>>>>>>>>> disable
>>>>>>>>>>>>>> the SMP option and disable "IO APIC" under "Local APIC").
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> #include <linux/version.h>
>>>>>>>>>>>>>> #include <linux/module.h>
>>>>>>>>>>>>>> #include <linux/ioport.h>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> #include <rtdm/rtdm_driver.h>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> int test_handler(rtdm_irq_t *irq_handle)
>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> rtdm_printk("irq_test: INTERRUPT!\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> return RTDM_IRQ_HANDLED;
>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> static rtdm_irq_t handle;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> static int __init __test_init(void)
>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> int err;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> rtdm_printk("irq_test: before rtdm_irq_request\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> err = rtdm_irq_request(&handle, 48, test_handler, 0,
>>>>>>>>>>>>>> "test_irq", NULL);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> rtdm_printk("irq_test: after rtdm_irq_request (err =
>>>>>>>>>>>>>> %d)\n",
>>>>>>>>>>>>>> err);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> rtdm_printk("irq_test: before rtdm_irq_enable\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> err = rtdm_irq_enable(&handle);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> rtdm_printk("irq_test: after rtdm_irq_enable (err =
>>>>>>>>>>>>>> %d)\n",
>>>>>>>>>>>>>> err);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> return err;
>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> static void __exit __test_exit(void)
>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> rtdm_irq_free(&handle);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> module_init(__test_init);
>>>>>>>>>>>>>> module_exit(__test_exit);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Can anyone help?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Best regards
>>>>>>>>>>>>>>> Ettore Pedretti
>>>>>>>>>>>> Alexis.
>>>>>>>>>> Alexis.
>>>>>>>> _______________________________________________
>>>>>>>> Xenomai-help mailing list
>>>>>>>> Xenomai-help@gna.org
>>>>>>>> https://mail.gna.org/listinfo/xenomai-help
>>>>>>>>
>>>> Alexis.
>>>>
>>>
>>>
>> Alexis.
>>
>
>
>
Alexis.
_______________________________________________
Xenomai-help mailing list
Xenomai-help@gna.org
https://mail.gna.org/listinfo/xenomai-help
