On Thu, 2009-11-26 at 10:34 +0100, Alexis Berlemont wrote: > 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
This is likely IRQ 48, with rthal_irq_enable jumping to address zero. > 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. > > This bug occurred before calling analogy_config, you did not tried to > attach the ni_pcimio driver, right ? > > If I am right, it seems like the bug is not located in analogy but > between Xenomai's nucleus and Ipipe, which is ... weird. > The IRQ requested does not seem to have been associated with any chip controller, which is likely the basic issue. > What is your kernel configuration ? no IO_APIC ? > Which irq did you try to request ? 48 or 5 ? > > Which CPU are you using ? > Looks like something being used in x86_32 mode. > 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 > >> > > > > > > > > -- > > Ettore Pedretti, SUPA > > School of Physics and Astronomy > > University of St Andrews, North Haugh, > > St Andrews, Fife, KY16 9SS, Scotland > > Ph: +44 1334 461669, Fax: +44-1334-463104 > > The University of St Andrews is a charity registered in Scotland : No > > SC013532 > > > > > Alexis. > > _______________________________________________ > Xenomai-help mailing list > Xenomai-help@gna.org > https://mail.gna.org/listinfo/xenomai-help -- Philippe. _______________________________________________ Xenomai-help mailing list Xenomai-help@gna.org https://mail.gna.org/listinfo/xenomai-help