Hello. I noticed an interesting thing here, with qemu-kvm, KSM and hugepages. When I initially enabled KSM, for my two windows guests I've seen ~100 000 pages in /sys/kernel/mm/ksm/pages_shared . That's quite good, and overall memory usage improved. Now, I also enabled hugepages in kvm, which speed things up quite significantly (the speedup is noticeable). But now, when both KSM and hugepages are activated, I don't see KSM in action anymore. /sys/../mm/pages_shared shows 56 pages, which is nothing. So I wonder what's up: o that's 56 _huge_ pages (which means the actual saving is 56*2M = 112Mb, which isn't really bad). If that's the case, /sys/../mm/ interface lacks proper units reporting; o due to large pages there's much less chance to find two pages with identical contents, so very little can be shared; o KSM does not scan hugepages at all o something else. What is the issue here? Thanks! /mjt -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
