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Since commit be0782e1 we are parsing /proc/meminfo to find out the default huge page size. However, if the host we are running at does not support any huge pages (e.g. CONFIG_HUGETLB_PAGE is turned off), we will not successfully parse the meminfo file and hence the whole qemu driver init process fails. Moreover, the default huge page size is needed if and only if there's at least one hugetlbfs mount point. So the fix consists of moving the virFileGetDefaultHugepageSize function call after the first hugetlbfs mount point is found. With this fix, we fail to start with one or more hugetlbfs mounts and malformed meminfo file, but that's expected (how can one mount hugetlbfs without kernel supporting huge pages?). Workaround in that case is to umount all the hugetlbfs mounts. Reported-by: Jim Fehlig <jfehlig@suse.com> Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
LibVirt : simple API for virtualization Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aim at providing long term stable C API initially for the Xen paravirtualization but should be able to integrate other virtualization mechanisms if needed. Daniel Veillard <veillard@redhat.com>
Description
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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