Nikola Ciprich wrote: > Anthony Liguori wrote: >> You won't see a gain with tmpfs. Make sure you reserve huge pages >> first. For a 1GB guest, you'll need something like: >> >> echo 540 > /proc/sys/vm/nr_hugepages >> >> When you create a VM, you need a bit more memory than 1GB for >> per-guest overhead. That's why I reserve 540 instead of 512. You >> can probably get away with 530 really. >> >> Check that it succeeded by cat'ing /proc/meminfo. >> > Well, I tried various values now, and booting fails immediately: > Decompressing Linux...
It's very likely that you won't be able to allocate enough pages to run a guest if your system has been running sufficient long and memory is highly fragmented. If you cat /proc/meminfo and HugePages_Free is much less than 540, you're not going to be able to create a 1GB guest. Unfortunately, you won't get a failure until the guest tries to use memory. The only solution is to reboot and reserve huge pages early before they get fragmented. Regards, Anthony Liguori > invalid compressed format (err=1) > > -- System halted > > > weird... > anyways I'll also give fresh kvm-65 a try now :) > ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Register now and save $200. Hurry, offer ends at 11:59 p.m., Monday, April 7! Use priority code J8TLD2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
