Re: [ANNOUNCE] v6.3-rc2-rt3

[John Ogness]

On 2023-04-14, Vlastimil Babka <vbabka@xxxxxxx> wrote:
> Is it perhaps a similar situation to this thread?
>
> https://lore.kernel.org/all/20230412124735.GE628377@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/

We are dealing with a spin_lock() inside a raw_spin_lock() section. The
legacy console drivers do this. The fix is the new atomic/threaded
consoles. For CONFIG_PREEMPT_RT a workaround is implemented so that the
legacy consoles avoid this. For !CONFIG_PREEMPT_RT you can expect
CONFIG_PROVE_RAW_LOCK_NESTING to cause a splat on that printk().

Or perhaps that particular printk() in cblist_init_generic() should be
changed to printk_deferred() as a temporary whack-a-mole
workaround.

John Ogness