On Fri, Jan 30, 2015 at 03:33:43PM -0800, G. Richard Bellamy wrote:
Hello All, I'm trying to enable hugepages, I've turned off THP (Transparent Huge Pages), and enabled hugepages in memoryBacking, and set my 2MB hugepages count via sysctl. I'm getting "libvirtd[5788]: Failed to autostart VM 'atlas': internal error: Unable to find any usable hugetlbfs mount for 16777216 KiB" where atlas is one of my guests and 16777216 KiB is the amount of memory I'm trying to give to the guest.
Looking at the XML:
<memoryBacking>
<hugepages>
<page size='16777216' unit='KiB' nodeset='0'/>
This means you want the guest's memory to be allocated from 16GiB
hugepages. You probably wanted to put this there:
<page size='2' unit='MiB' ...
Yes, i can see the hugepages via numastat -m and hugetlbfs is mounted via /dev/hugepages and there is a dir structure /dev/hugepages/libvirt/qemu (it's empty). HugePages is big enough to accommodate the 16G i'm allocating... and changing the perms on that directory structure to 777 doesn't work either. Any help is much appreciated. HOST: http://sprunge.us/SEdc GUEST: http://sprunge.us/VCYB Regards, Richard _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
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