[PATCH V4] notifier/panic: Introduce panic_notifier_filter

[Guilherme G. Piccoli]

On 08/02/2022 21:31, bhe at redhat.com wrote:
> [...]
>> So, what are the opinions from kdump maintainers about this idea?
>> Baoquan / Vivek / Dave, does it make sense to you? Do you have any
>> suggestions/concerns to add on top of Petr draft?
> 
> Yeah, it's reasonable. As I replied to Michael in another thread, I
> think splitting the current notifier list is a good idea. At least the
> code to archieve hyper-V's goal with panic_notifier is a little odd and
> should be taken out and execute w/o conditional before kdump, and maybe
> some others Petr has combed out.
> 
> For those which will be switched on with the need of adding panic_notifier
> or panic_print into cmdline, the heavy users like HATAYAMA and Masa can
> help check.
> 
> For Petr's draft code, does it mean hyper-V need another knob to trigger
> the needed notifiers? Will you go with the draft direclty? Hyper-V now
> runs panic notifiers by default, just a reminder.
> 

Hi Baoquan, thanks for your comments.

I'll need to study the Hyper-V code and how it's done today - I guess
most part of this implementation will be studying the notifiers we have
currently, split them among the 3 new notifiers and comb them into
patches, so they can be reviewed for all relevant maintainers (who know
the code we are changing).

I'm not sure if I go directly with the draft, likely it'll have some
changes, but the draft should be the skeleton of the new implementation.
Specially if you/other kdump maintainers agree it's a good idea =)

Cheers,


Guilherme