> On Oct 9, 2019, at 12:23 PM, Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > If this was only about the memory offline code then I would agree. But > we are talking about any printk from the zone->lock context and that is > a bigger deal. Besides that it is quite natural that the printk code > should be more universal and allow to be also called from the MM > contexts as much as possible. If there is any really strong reason this > is not possible then it should be documented at least. Where is the best place to document this? I am thinking about under the “struct zone” definition’s lock field in mmzone.h. Does workaround this potential deadlock and fix a few lockdep false positives for free count as a really strong reason?
