[alsa-devel] [PATCH v2 12/12] ASoC: SOF: Intel: hda-codec: fix memory allocation

[Yang, Libin]

>-----Original Message-----
>From: Takashi Iwai [mailto:tiwai at suse.de]
>Sent: Thursday, May 23, 2019 4:27 PM
>To: Yang, Libin <libin.yang at intel.com>
>Cc: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>; alsa-
>devel at alsa-project.org; broonie at kernel.org
>Subject: Re: [alsa-devel] [PATCH v2 12/12] ASoC: SOF: Intel: hda-codec: fix
>memory allocation
>
>On Thu, 23 May 2019 10:21:20 +0200,
>Yang, Libin wrote:
>>
>> Hi Takashi,
>>
>> >-----Original Message-----
>> >From: Takashi Iwai [mailto:tiwai at suse.de]
>> >Sent: Thursday, May 23, 2019 4:16 PM
>> >To: Yang, Libin <libin.yang at intel.com>
>> >Cc: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>;
>> >alsa- devel at alsa-project.org; broonie at 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?
>
>You can enable CONFIG_DEBUG_DEVRES and adjust the devres.log option for
>showing each devres allocation and removal.  And I'd try
>CONFIG_DEBUG_SLAB and CONFIG_DEBUG_KMEMLEAK or whatever
>interesting in CONFIG_DEBUG section, too.

Thanks. I will have a try.

Regards,
Libin

>
>
>Takashi