linux-kernel - Re: [LKP] [drm/radeon] BUG: unable to handle kernel paging request at 03200000

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Date:	Thu, 18 Dec 2014 14:07:44 +0200
From:	Oded Gabbay <oded.gabbay@....com>
To:	Huang Ying <ying.huang@...el.com>
CC:	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: Re: [LKP] [drm/radeon] BUG: unable to handle kernel paging request
 at 03200000



On 12/18/2014 01:42 PM, Oded Gabbay wrote:
>
>
> On 12/18/2014 10:26 AM, Huang Ying wrote:
>> On Thu, 2014-12-18 at 10:20 +0200, Oded Gabbay wrote:
>>> On 12/18/2014 10:17 AM, Huang Ying wrote:
>>>> FYI, we noticed the below changes on
>>>>
>>>> commit e28740ece34d314002b1ddfa14e8fb7c7b909489 ("drm/radeon: Add radeon
>>>> <--> amdkfd interface")
>>>>
>>>>
>>>> +------------------------------------------+------------+------------+
>>>> |                                          | 1c0a46255f | e28740ece3 |
>>>> +------------------------------------------+------------+------------+
>>>> | boot_successes                           | 0          | 0          |
>>>> | boot_failures                            | 10         | 13         |
>>>> | BUG:kernel_boot_hang                     | 9          | 9          |
>>>> | INFO:suspicious_RCU_usage                | 1          | 3          |
>>>> | backtrace:do_fork                        | 1          | 3          |
>>>> | BUG:unable_to_handle_kernel              | 0          | 3          |
>>>> | Oops                                     | 0          | 3          |
>>>> | Kernel_panic-not_syncing:Fatal_exception | 0          | 3          |
>>>> | backtrace:radeon_init                    | 0          | 3          |
>>>> | backtrace:kernel_init_freeable           | 0          | 3          |
>>>> | BUG:kernel_boot_crashed                  | 0          | 1          |
>>>> +------------------------------------------+------------+------------+
>>>>
>>>>
>>>> [    5.407193] Linux agpgart interface v0.103
>>>> [    5.428469] [drm] Initialized drm 1.1.0 20060810
>>>> [    5.438456] [drm] radeon kernel modesetting enabled.
>>>> [    5.439741] BUG: unable to handle kernel paging request at 03200000
>>>> [    5.440063] IP: [<03200000>] 0x3200000
>>>> [    5.440063] *pde = 00000000
>>>> [    5.440063] Oops: 0000 [#1] SMP
>>>> [    5.440063] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-g603ba7e #14
>>>> [    5.440063] task: 42e08000 ti: 42e02000 task.ti: 42e02000
>>>> [    5.440063] EIP: 0060:[<03200000>] EFLAGS: 00010246 CPU: 0
>>>> [    5.440063] EIP is at 0x3200000
>>>> [    5.440063] EAX: 00000001 EBX: 00000000 ECX: 4738b460 EDX: 45735a64
>>>> [    5.440063] ESI: 4662d0dd EDI: 401fafa0 EBP: 42e03f20 ESP: 42e03f18
>>>> [    5.440063]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
>>>> [    5.440063] CR0: 8005003b CR2: 03200000 CR3: 067f0000 CR4: 00000690
>>>> [    5.440063] Stack:
>>>> [    5.440063]  44bf19b1 00000000 42e03f28 4662d20b 42e03f8c 465b6e5d
>>>> 00000000 00000000
>>>> [    5.440063]  00000000 00000000 00000000 00000000 000000ea 00000000
>>>> 00000000 00000101
>>>> [    5.440063]  45f2dfba 00000010 00000012 00000200 47fdcf54 47fdcf54
>>>> 00000006 00000291
>>>> [    5.440063] Call Trace:
>>>> [    5.440063]  [<44bf19b1>] ? radeon_kfd_init+0x67/0xab
>>>> [    5.440063]  [<4662d20b>] radeon_init+0x12e/0x15c
>>>> [    5.440063]  [<465b6e5d>] do_one_initcall+0x25f/0x41e
>>>> [    5.440063]  [<465b7291>] kernel_init_freeable+0x275/0x423
>>>> [    5.440063]  [<455b4e52>] kernel_init+0x1c/0x293
>>>> [    5.440063]  [<455df181>] ret_from_kernel_thread+0x21/0x30
>>>> [    5.440063]  [<455b4e36>] ? rest_init+0x33e/0x33e
>>>> [    5.440063] Code:  Bad EIP value.
>>>> [    5.440063] EIP: [<03200000>] 0x3200000 SS:ESP 0068:42e03f18
>>>> [    5.440063] CR2: 0000000003200000
>>>> [    5.440063] ---[ end trace 1959b295b01c0c14 ]---
>>>> [    5.440063] Kernel panic - not syncing: Fatal exception
>>>>
>>>>
>>>> Thanks,
>>>> Huang, Ying
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> LKP mailing list
>>>> LKP@...ux.intel.com
>>>>
>>>
>>> Is this a 32-bit kernel ?
>>> Is amdkfd compiled ?
>>
>> The kconfig file is attached in the original email.  From it, it is
>> 32-bit kernel.  I don't find AMDKFD in config file.  Could you help me
>> to check it?
>>
>> Best Regards,
>> Huang, Ying
>>
>>
>> --
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>>
>
> Are you using some specific distribution or h/w ?
> I'm compiling that commit with the Kconfig you sent me, installing it on a
> Debian 7.7 32-bit installation inside VirtualBox, and it doesn't even boot.
>
> Must I use a native installation ?
>
>      Oded
I tried also running it more or less like you do, in qemu, but I don't get past 
the line:
Booting the kernel.

I'm not used to working with 32-bit kernels, as amdkfd doesn't support that at 
all. Could you give me some help to make the kernel run at all ?

	Oded
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