Re: [PATCH v3 0/2] Reduce CPU consumption after panic

[Andrew Morton <akpm@linux-foundation.org>]

(cc more x86 people)

On Tue, 29 Apr 2025 10:06:36 -0500 carlos.bilbao@kernel.org wrote:

> From: Carlos Bilbao <carlos.bilbao@kernel.org>
> 
> Provide a priority-based mechanism to set the behavior of the kernel at
> the post-panic stage -- the current default is a waste of CPU except for
> cases with console that generate insightful output.
> 
> In v1 cover letter [1], I illustrated the potential to reduce unnecessary
> CPU resources with an experiment with VMs, reducing more than 70% of CPU
> usage. The main delta of v2 [2] was that, instead of a weak function that
> archs can overwrite, we provided a flexible priority-based mechanism
> (following suggestions by Sean Christopherson), panic_set_handling().
> 

An effect of this is that the blinky light will never again occur on
any x86, I think?  I don't know what might the effects of changing such
longstanding behavior.

Also, why was the `priority' feature added?  It has no effect in this
patchset.