On Thu, 18 Aug 2011, Justin Piszcz wrote: > > The max of NUMA nodes is specified by CONFIG_NODES_SHIFT, > > in your case, it is 6, which means it supports up to 2^6 nodes. > Ok, is there any overhead having more than is needed? > Yeah, try to avoid going above 8 because that causes nodemasks that are typically allocated on the stack of kernel text to be dynamically allocated through the slab allocator to avoid the possibility of overflow. I doubt you have the need for more than 64 nodes, so I'd highly recommend leaving it at the default unless you want to debug or test some large numa=fake settings. -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
