Re: [PATCH] mce: fix missing stack-dumping in mce_panic()

[Miaohe Lin]

On 2023/1/9 12:45, Luck, Tony wrote:
>>> Maybe then I can look at some way to suppress the oops dump for the "useless"
>>> cases? Or perhaps at least add an extra message that stack dumps from arbitrary
>>> machine checks are rarely useful.
>>
>> IMHO the user will always expect a stack dump when system panic. I'm afraid that if these
>> "useless" cases are eliminated, it will cause user confused and trying to find what eats
>> the stack dump?
> 
> What about the "extra message" option?  Always print the full oops. but for ones from
> mce_panic() arrange somehow to add an extra bit of helpful text. Something like this:
> 
> 1) For poison consumption in kernel code:
> 
> "The reason for this panic is consumption of poisoned data by the kernel"
> 
> 2) For the general machine check case:
> 
> "The reason for this panic is a hardware detected error reported as a machine check.
>  Note that the stack and register dumps are likely useless to diagnose the root cause
>  of this panic."

It sounds like a good idea to me. Many thanks for your thought. And it's fine to squash my patch
to your provided thought. :)

Thanks,
Miaohe Lin