Hello, On 06/18/2010 07:31 PM, Christoph Lameter wrote: > We need SLUB_PAGE_SHIFT * sizeof(kmem_cache_cpu). So it would be > > BUILD_BUG_ON(PERCPU_DYNAMIC_EARLY_SIZE < SLUB_PAGE_SHIFT * sizeof(struct > kmem_cache_cpu))? Yeah, something like that but I would add some buffer there for alignment and whatnot. > What is the role of SLOTS? It's allocation map. Each consecutive allocs consume one if alignment doesn't require padding but two if it does. ie. It limits how many items one can allocate. > Each kmem_cache_cpu structure is a separate percpu allocation. If it's a single item. Nothing to worry about. Thanks. -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>