Re: [PATCH 0/9] sched: make WARN_ON under rq->lock deadlock-safe (SCHED_WARN_ON)

[Peter Zijlstra]

Sorry, no. I've said it before and I'll stick with it. Just no.

printk_deferred() is an abomination, it means that if you mess up the
machine properly you'll *NEVER* see the output.

As per always, printk() is the one that needs fixing, and IIRC they were
very close to getting there.