KVM guests benefit a lot from being able to use transparent hugepages in both the host and the guest, cutting the number of memory accesses to fill a TLB entry almost in half when using EPT/NPT. However, currently memory is ballooned in 4kB units, leading to fragmentation of guest memory and an inability to use 2MB pages. One obvious fix is to do memory ballooning in 2MB increments, however there appear to be several obstacles in the way of compaction actually creating contiguous 2MB areas of free memory. I would like to discuss / brainstorm improvements to compaction and ways to keep memory allocations better separated, to be better able to come up with contiguous 2MB areas. -- All rights reversed -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>