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SubjectRe: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U9
Thomas Gleixner wrote:
> On Thu, 2004-10-21 at 20:57, K.R. Foley wrote:
>
>>>I guess, you don't have a tulip network card in your box, as the module
>>>is removed.
>>>
>>>The question is, if it got registered correctly before the removal.
>>
>>Actually I do have the tulip card in the box and I am pulling this stuff
>>from the logs over that connection now. Here are the next lines from the
>>log that might help.
>
>

More info on this:

As mentioned before, I get this on boot (every boot):

Oct 21 12:33:22 porky kernel: Linux Tulip driver version 1.1.13 (May 11,
2002)
Oct 21 12:33:22 porky kernel: PCI: Found IRQ 5 for device 0000:04:0a.0
Oct 21 12:33:22 porky kernel: PCI: Sharing IRQ 5 with 0000:04:05.1
Oct 21 12:33:22 porky kernel: tulip0: EEPROM default media type Autosense.
Oct 21 12:33:22 porky kernel: tulip0: Index #0 - Media MII (#11)
described by a 21140 MII PHY (1) block.
Oct 21 12:33:22 porky kernel: tulip0: MII transceiver #3 config 3100
status 7809 advertising 01e1.
Oct 21 12:33:22 porky kernel: eth0: Digital DS21140 Tulip rev 32 at
0xe480, 00:00:C0:7F:A0:E9, IRQ 5.
Oct 21 12:33:22 porky kernel: BUG: atomic counter underflow at:
Oct 21 12:33:22 porky kernel: [<c0254dd8>] qdisc_destroy+0x98/0xa0 (12)
Oct 21 12:33:22 porky kernel: [<c0254fed>] dev_shutdown+0x3d/0xa0 (16)
Oct 21 12:33:22 porky kernel: [<c024773b>]
unregister_netdevice+0x13b/0x280 (28)
Oct 21 12:33:22 porky netfs: Mounting other filesystems: succeeded
Oct 21 12:33:22 porky kernel: [<c0112fb0>] mcount+0x14/0x18 (12)
Oct 21 12:33:22 porky kernel: [<e09a6160>] tulip_remove_one+0x0/0xa0
[tulip] (4)
Oct 21 12:33:22 porky kernel: [<c02058de>] unregister_netdev+0x1e/0x30 (24)
Oct 21 12:33:22 porky kernel: [<e09a618f>] tulip_remove_one+0x2f/0xa0
[tulip] (16)
Oct 21 12:33:22 porky kernel: [<c01f2907>]
device_release_driver+0x67/0x70 (8)
Oct 21 12:33:22 porky kernel: [<c0112fb0>] mcount+0x14/0x18 (8)
Oct 21 12:33:22 porky kernel: [<c01c4e26>] pci_device_remove+0x76/0x80 (20)
Oct 21 12:33:22 porky kernel: [<c01f573b>]
device_detach_shutdown+0xb/0x40 (12)
Oct 21 12:33:22 porky kernel: [<c01f2907>]
device_release_driver+0x67/0x70 (12)
Oct 21 12:33:22 porky kernel: [<c01f293b>] driver_detach+0x2b/0x40 (24)
Oct 21 12:33:22 porky kernel: [<c01f2daf>] bus_remove_driver+0x3f/0x70 (20)
Oct 21 12:33:22 porky kernel: [<c01f32b9>] driver_unregister+0x19/0x30 (20)
Oct 21 12:33:22 porky kernel: [<c01c50cc>]
pci_unregister_driver+0x1c/0x30 (16)
Oct 21 12:33:22 porky kernel: [<e09a7767>] tulip_cleanup+0x17/0x1b
[tulip] (16)
Oct 21 12:33:22 porky kernel: [<c0139801>]
sys_delete_module+0x121/0x150 (12)
Oct 21 12:33:22 porky kernel: [<c01531a1>] sys_munmap+0x51/0x60 (64)
Oct 21 12:33:22 porky kernel: [<c0116a20>] do_page_fault+0x0/0x660 (16)
Oct 21 12:33:22 porky kernel: [<c0106719>] sysenter_past_esp+0x52/0x71 (16)
Oct 21 12:33:22 porky kernel: preempt count: 00000001
Oct 21 12:33:22 porky kernel: . 1-level deep critical section nesting:
Oct 21 12:33:22 porky kernel: .. entry 1: print_traces+0x1d/0x60 /
(dump_stack+0x23/0x30)
Oct 21 12:33:22 porky kernel:
Oct 21 12:33:22 porky kernel: tulip 0000:04:0a.0: Device was removed
without properly calling pci_disable_device(). This may need fixing.

I am not sure why the tulip driver is being loaded,unloaded,reloaded
every time on boot? Anyway, I wanted to check to see if I could generate
the above bug on subsequent unloads of the module. I downed the network
and the unloaded the tulip module. I did get the message below when
unloading the module but no "BUG: atomic counter underflow" message.

Oct 22 05:43:33 porky kernel: tulip 0000:04:0a.0: Device was removed
without properly calling pci_disable_device(). This may need fixing.
Oct 22 05:43:33 porky net.agent[921]: remove event not handled

kr
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