On 3/19/20 1:32 AM, Michael Ellerman wrote: > Seems like a nice solution to me Thanks :) >> ----8<---- >> diff --git a/mm/slub.c b/mm/slub.c >> index 17dc00e33115..1d4f2d7a0080 100644 >> --- a/mm/slub.c >> +++ b/mm/slub.c >> @@ -1511,7 +1511,7 @@ static inline struct page *alloc_slab_page(struct kmem_cache *s, >> struct page *page; >> unsigned int order = oo_order(oo); >> >> - if (node == NUMA_NO_NODE) >> + if (node == NUMA_NO_NODE || !node_online(node)) > > Why don't we need the node_present_pages() check here? Page allocator is fine with a node without present pages, as long as there's a zonelist, which online nodes must have (ideally all possible nodes should have, and then we can remove this). SLUB on the other hand doesn't allocate cache per-cpu structures for nodes without present pages (understandably) that's why the other place includes the node_present_pages() check. Thanks
