Re: [PATCH 0/2] sched: Introduce and use deferred WARNs in sched

[Peter Zijlstra]

On Tue, Jun 23, 2026 at 04:26:48PM +0200, Sebastian Andrzej Siewior wrote:
> This is a follow-up to the netconsole lockup reported
> 	https://lore.kernel.org/all/20260610183621.3915271-1-vlad.wing@xxxxxxxxx/
> 
> The idea is to use deferred printing for WARNs and use them in sched. I
> tried to use only where it looks that the rq lock acquired instead a
> plain s/WARN_ON/WARN_ON_DEFFERED which would be simpler.
> 
> This unholy deferred mess can be removed once we don't have legacy
> consoles anymore _or_ force force_legacy_kthread=true.

So I really don't see why we should do this. This has been a 'problem'
forever, and printk() is actually being fixed.