Re: hugetlbfs and KSM

2010-04-09 Thread Chris Wright
* Bernhard Schmidt (be...@birkenwald.de) wrote: * KSM seems to be largely ineffective (100MB saved - 1.3MB saved) Am I doing something wrong? Is this a bug? Is this generally impossible with large pages (which might explain the lower load on the host, if large pages are not scanned)? Or is

hugetlbfs and KSM

2010-04-08 Thread Bernhard Schmidt
Hi, running Debian Squeeze with a 2.6.32-3-amd64 kernel and qemu-kvm 0.12.3 I enabled hugetlbfs on a rather small box with about five similar VMs today (all Debian Squeeze amd64, but different services) Pro: * system load on the host has gone way down (by about 50%) Contra: * KSM seems to be

Re: hugetlbfs and KSM

2010-04-08 Thread David Martin
I asked this question quite a while ago, it seems huge pages do not get scanned for merging. David Martin - Bernhard Schmidt be...@birkenwald.de wrote: Hi, running Debian Squeeze with a 2.6.32-3-amd64 kernel and qemu-kvm 0.12.3 I enabled hugetlbfs on a rather small box with about