Re: [Xenomai-help] fata: removing non-linked element...

[Jan Kiszka <jan.kiszka@domain.hid>]

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Philippe Gerum wrote:
> On Fri, 2007-02-16 at 18:58 +0100, Jan Kiszka wrote:
>> Jan Kiszka wrote:
>>> ...
>>> /me now watching what happens at 10 kHz...
>> Bad news are sometimes good news:
>>
>> # ./main
>> # rmmod xeno_native
>> # modprobe xeno_native
>> # ./main
>>
>>> [  629.916921] Xenomai: stopping RTDM services.
>>> [  632.954058] Xenomai: stopping native API services.
>>> [  641.763276] Xenomai: starting native API services.
>>> [  643.849294] BUG: unable to handle kernel paging request at virtual address c484eb58
>>> [  643.857099]  printing eip:
>>> [  643.859835] c013a173
>>> [  643.862050] *pde = 03fdb067
>>> [  643.864868] *pte = 00000000
>>> [  643.867696] Oops: 0000 [#1]
>>> [  643.870517] PREEMPT
>>> [  643.872747] Modules linked in: xeno_native 8139too eepro100 sd_mod scsi_mod
>>> [  643.879873] CPU:    0
>>> [  643.879884] EIP:    0060:[<c013a173>]    Not tainted VLI
>>> [  643.879904] EFLAGS: 00013046   (2.6.19.3 #28)
>>> [  643.891932] EIP is at xnheap_init_mapped+0x144/0x1a8
> 
> I've just found an issue which caused rt_queue_delete() to leave
> dandling mmapped segments when attempting to remove a busy queue (i.e.
> still bound to another descriptor in user-space).
> 
> Could you resync with v2.3.x (or trunk) head revision and try again?
> TIA,
> 

After resync and running main once:

> [   90.782016] Xenomai: stopping native API services.
> [   90.987985] BUG: unable to handle kernel paging request at virtual address c4813808
> [   90.996022]  printing eip:
> [   90.998921] c01965d9
> [   91.001290] *pde = 03fd4067
> [   91.004267] *pte = 00000000
> [   91.007267] Oops: 0000 [#1]
> [   91.010246] PREEMPT
> [   91.012693] Modules linked in: xeno_native 8139too eepro100 sd_mod scsi_mod
> [   91.020385] CPU:    0
> [   91.020430] EIP:    0060:[<c01965d9>]    Not tainted VLI
> [   91.020515] EFLAGS: 00010286   (2.6.19.3 #29)
> [   91.032862] EIP is at remove_proc_entry+0x33/0x26a
> [   91.037892] eax: 00000000   ebx: c484c620   ecx: ffffffff   edx: c2c961e0
> [   91.044944] esi: 00000038   edi: c4813808   ebp: c1351f20   esp: c1351ef4
> [   91.051984] ds: 007b   es: 007b   ss: 0068
> [   91.056297] Process rmmod (pid: 906, ti=c1350000 task=c3422a70 task.ti=c1350000)
> [   91.063761] Stack: 00002245 00000282 00000000 00000000 6f6e6578 c1351f20 c2c961e0 c4813808
> [   91.073076]        c484c620 00000038 00000000 c1351f34 c01458f7 00000000 00000000 6f6e6578
> [   91.082388]        c1351f44 c013e20b c48f2e80 00000000 c1351f4c c0144163 c1351f58 c48e3055
> [   91.091724] Call Trace:
> [   91.094659]  [<c01458f7>] xnregistry_cleanup+0x34/0x10f
> [   91.100310]  [<c013e20b>] xnpod_shutdown+0x118/0x167
> [   91.105710]  [<c0144163>] xncore_detach+0x1f/0x21
> [   91.110816]  [<c48e3055>] cleanup_module+0x55/0x57 [xeno_native]
> [   91.117352]  [<c0130c53>] sys_delete_module+0x16a/0x193
> [   91.123008]  [<c0102df6>] syscall_call+0x7/0xb
> [   91.127878]  [<b7e504c2>] 0xb7e504c2
> [   91.131770]  =======================
> [   91.135540] Code: 20 e8 04 3c f7 ff 85 d2 89 55 ec 89 45 f0 75 13 8d 4d f0 8d 55 ec e8 16 ff ff ff 85 c0 0f 85 37
> 02 00 00 8b 7d f0 31 c0 83 c9 ff <f2> ae f7 d1 49 81 3d 00 d2 2e c0 80 ae 2e c0 89 4d e4 75 07 b0
> [   91.159520] EIP: [<c01965d9>] remove_proc_entry+0x33/0x26a SS:ESP 0068:c1351ef4

I'm going to re-check that my build was clean, but I think so.


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