Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: libvirt (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1643675
Title:
hugepages for non-default pagesize need manual setup
Status in libvirt package in Ubuntu:
Confirmed
Status in systemd package in Ubuntu:
Confirmed
Status in nova-compute package in Juju Charms Collection:
Triaged
Bug description:
This is a amd64 xenial/mitaka deploy using 1607 charms release
where I need to have 1G hugepages available for openstack/kvm.
nova-compute charm should provide ways to ease e.g.
1G hugepages setup, currently only exposes a
"hugepages" setting that ends setting vm.nr_hugepages
for the node, but even after settings kernel cmdline
parameters for 1G hugepages (hugepagesz=1G hugepages=128),
is not usable by libvirt-bin:
#1 systemd:
Installs /lib/systemd/system/dev-hugepages.mount with
default pagesize
=> no hugetblfs mount with (e.g.) pagesize=1G
#2 libvirt-bin:
Installs apparmor profile ("libvirt-qemu") which only allows:
# for access to hugepages
owner "/run/hugepages/kvm/libvirt/qemu/**" rw,
owner "/dev/hugepages/libvirt/qemu/**" rw,
=> not possible to have other mount points for other pagesizes.
I've workaround'd #1,#2 above by overriding systemd's
by creating a /etc/systemd/system/dev-hugepages.mount
with below extra line at [Mount] section:
Options=pagesize=1G
-> https://paste.ubuntu.com/23513048/
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