On 2023-06-23 12:40:24 [+0200], Petr Mladek wrote: > > but I would rather suggest lockdep annotation instead of disabling > > either preemption or migration. If I read the comment on top right, this > > API isn't open for the public. > > It might work when mm people agree to explicitly call > migrate_disable() in __build_all_zonelists(). I mean > to call there: > > migrate_disable(); > printk_deferred_enter(); > write_seqlock_irqsave(&zonelist_update_seq, flags); > > Plus it would require some comments. right but I wanted to move it after write_seqlock_irqsave(). > > To be honst, I would suggest to work towards always printing in a thread > > with an emergency console than this deferred/ safe duckt tape. > > I have used this argument many years. But it is not much convincing > after 10 years. Note that John has sent 1st RFC 4 years ago and we > still do not have the kthreads :-/ Yes, it makes me very sad. It feels longer than that. We have in RT ever since… > Best Regards, > Petr Sebastian
