Re: [libvirt-users] HugePages - can't start guest that requires them

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(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users >