Re: OOPS on module unload 2.5.47-mm1

From: Jens Axboe (axboe@suse.de)
Date: Wed Nov 13 2002 - 02:22:28 EST

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On Tue, Nov 12 2002, Badari Pulavarty wrote:
> Hi,
>
> I get following panic while rmmod qla driver. (2.5.47-mm1).
>
> Is this a known problem ? Any ideas ?
>
> Thanks,
> Badari
>
>
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Synchronizing SCSI cache:
> Unable to handle kernel paging request at virtual address 5a5a5a5e
> printing eip:
> c025ea85
> *pde = 00000000
> Oops: 0002
> qla2200
> CPU: 0
> EIP: 0060:[<c025ea85>] Not tainted
> EFLAGS: 00010287
> EIP is at __blk_cleanup_queue+0x25/0x70
> eax: 5a5a5a5a ebx: d31c8c94 ecx: d23ab5ac edx: d31c8c94
> esi: 000001ab edi: d31c8c90 ebp: d302f000 esp: d2eebf28
> ds: 0068 es: 0068 ss: 0068
> Process rmmod (pid: 2708, threadinfo=d2eea000 task=d2e48180)
> Stack: 00000800 d2f60000 d31c8c2c c025eae7 d31c8c90 d31c8c00 f89424c0 c02960d9
> d31c8c2c d2f60000 00000006 c0295f22 d2f60000 d2a44000 c0295f10 c0295e2d
> d2f60000 00000006 d2eea000 00000000 c029694e f89424c0 c0295f10 f8915000
> Call Trace:
> [<c025eae7>] blk_cleanup_queue+0x17/0x60
> [<f89424c0>] driver_template+0x0/0x68 [qla2200]
> [<c02960d9>] scsi_remove_host+0x179/0x1b0
> [<c0295f22>] scsi_remove_legacy_host+0x12/0x50
> [<c0295f10>] scsi_remove_legacy_host+0x0/0x50
> [<c0295e2d>] scsi_tp_for_each_host+0x7d/0x110
> [<c029694e>] scsi_unregister_host+0x6e/0xf0
> [<f89424c0>] driver_template+0x0/0x68 [qla2200]
> [<c0295f10>] scsi_remove_legacy_host+0x0/0x50
> [<f8929aba>] exit_this_scsi_driver+0xa/0x10 [qla2200]
> [<f89424c0>] driver_template+0x0/0x68 [qla2200]
> [<c012081e>] free_module+0x1e/0x130
> [<c011faa4>] sys_delete_module+0x1b4/0x410
> [<c0109173>] syscall_call+0x7/0xb
>
> Code: 89 50 04 89 02 89 09 89 49 04 51 8b 0d 0c 43 5c c0 46 51 e8

Hmm, look as if the rq on the freelist has already been free'ed. But if
it had, it shouldn't be on the list. At least there's a small bug there,
the elevator_exit() needs to be before the __blk_cleanup_queue() calls
in blk_cleanup_queue().

Maybe try dumping blk_init_queue() and blk_cleanup_queue() calls to see
if they match up?

-- Jens Axboe

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Next message: Priit Laes: "Re: GA-7VRXP is a bad motherboard [was Re: PDC20276 Linux driver]"
Previous message: Denis Vlasenko: "Re: Some functions are not inlined by gcc 3.2, resulting code is ugly"
In reply to: Badari Pulavarty: "OOPS on module unload 2.5.47-mm1"
Next in thread: Patrick Mansfield: "Re: OOPS on module unload 2.5.47-mm1"
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