From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: Re: [PATCH v2 12/12] ASoC: SOF: Intel: hda-codec: fix
 memory allocation
Date: Thu, 23 May 2019 06:35:05 -0500
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To: "Yang, Libin" <libin.yang@intel.com>, Takashi Iwai <tiwai@suse.de>
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On 5/23/19 3:24 AM, Yang, Libin wrote:
> Hi Takashi,
> 
> 
>>> -----Original Message-----
>>> From: Takashi Iwai [mailto:tiwai@suse.de]
>>> Sent: Thursday, May 23, 2019 4:16 PM
>>> To: Yang, Libin <libin.yang@intel.com>
>>> Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>; alsa-
>>> devel@alsa-project.org; broonie@kernel.org
>>> Subject: Re: [alsa-devel] [PATCH v2 12/12] ASoC: SOF: Intel: hda-codec:
>>> fix memory allocation
>>>
>>> On Thu, 23 May 2019 10:03:03 +0200,
>>> Yang, Libin wrote:
>>>>
>>>> Please let me describe the issue here.
>>>>
>>>> The test case is:
>>>> 1) Unload module with script "sudo ./sof_remove.sh" ,
>>>> 2) reload module with script "sudo ./sof_insert.sh"
>>>>
>>>> After several rounds of removing and inserting kernel modules, system
>>>> will complain like below:
>>>> "BUG: unable to handle kernel paging request at 000000292a282031"
>>>
>>> Did you try some kernel debug options?  It might show what went wrong.
>>
>> No, I haven't. I'm not sure which options I can use for this case. Could you
>> please give me some suggestions?
> 
> BTW: I have enabled DEBUG_DEVRES. Are there any other options I can try?

There are already a set of kconfig fragments for debug, see 
https://github.com/thesofproject/kconfig and select memory-debug-defconfig.

I guess I will need to require this test in the SOF CI, I really don't 
get how this issue was not seen earlier. Gah.