On Fri, 2019-10-04 at 15:07 +0200, Michal Hocko wrote: > On Fri 04-10-19 08:56:16, Qian Cai wrote: > [...] > > It might be a good time to rethink if it is really a good idea to dump_page() > > at all inside has_unmovable_pages(). As it is right now, it is a a potential > > deadlock between console vs memory offline. More details are in this thread, > > > > https://lore.kernel.org/lkml/1568817579.5576.172.camel@xxxxxx/ > > Huh. That would imply we cannot do any printk from that path, no? Yes, or use something like printk_deferred() or it needs to rework of the current console locking which I have no clue yet.
