Re: [PATCH v3 07/18] arm64: defconfig: Enable Qualcomm minidump driver

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On 04/05/2023 13:45, Mukesh Ojha wrote:
> 
> 
> On 5/4/2023 4:53 PM, Krzysztof Kozlowski wrote:
>> On 03/05/2023 19:02, Mukesh Ojha wrote:
>>> Previous patches add the Qualcomm minidump driver support, so
>>> lets enable minidump config so that it can be used by kernel
>>> clients.
>>>
>>> Signed-off-by: Mukesh Ojha <quic_mojha@xxxxxxxxxxx>
>>
>> This patchset is split too much. Defconfig change is one change. Not two
>> or three.
>>
>>> ---
>>>   arch/arm64/configs/defconfig | 1 +
>>>   1 file changed, 1 insertion(+)
>>>
>>> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
>>> index a24609e..831c942 100644
>>> --- a/arch/arm64/configs/defconfig
>>> +++ b/arch/arm64/configs/defconfig
>>> @@ -1250,6 +1250,7 @@ CONFIG_QCOM_STATS=m
>>>   CONFIG_QCOM_WCNSS_CTRL=m
>>>   CONFIG_QCOM_APR=m
>>>   CONFIG_QCOM_ICC_BWMON=m
>>> +CONFIG_QCOM_MINIDUMP=y
>>
>> This must be a module.
> 
> Why do you think this should be a module ?
> 
> Is it because, it is lying here among others '=m' ?

Because we want and insist on everything being a module. That's the
generic rule. There are exceptions, so if this justifies being an
exception, please bring appropriate arguments.

> 
> Or you have some other reasoning ? like it is for qcom specific
> soc and can not be used outside ? but that is not true for
> all configs mentioned here.
> 
> The reason behind making it as '=y' was, to collect information from 
> core kernel data structure as well as the information like percpu data, 
> run queue, irq stat kind of information on kernel crash on a target 
> running some perf configuration(android phone).

I don't understand why =m stops you from all that. What's more, I don't
understand why do you refer to the Android here. This is a development
and debugging Linux defconfig, not Android reference config for vendors...

Best regards,
Krzysztof




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