On Sat, 14 Jul 2007, Nick Piggin wrote: > Isn't it still possible that you could have TLB pressure that would > result in lower performance? I wonder why the large page support for > ia64 was shelved?
16M Large memmap support was shelved because 16M is too large a size for a vmemmap block. It results in the vmemmap overlapping multiple nodes. The TLB pressure for the 16k support is the same since its the same algorithm. We are measuring discontig/vmemmap 16k against sparse/vmemmap 16k here. We would likely see a different if we would compare sparsemem vs. sparse/vmemmap. Then there may be a difference in TLB pressure. But 16k discontig/vmemmap is the current default on IA64. - To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
