There are two bugs in this function: 1. cannot start a vm with cpuset but without numatune settings # virsh -c lxc:/// start helloworld error: Failed to start domain helloworld error: internal error: guest failed to start: Invalid value '1-3' for 'cpuset.mems': Invalid argument we don't free &mask after use it for virCgroupSetCpusetCpus() and then virDomainNumatuneMaybeFormatNodeset() do not get a new &mask, then we use it in virCgroupSetCpusetMems(). 2. when start a lxc with numatune memory mode not strict # virsh -c lxc:/// start helloworld error: Failed to start domain helloworld error: internal error: guest failed to start: Unknown failure in libvirt_lxc startup We shouldn't set anything in cpuset.mems for these mode. Signed-off-by: Luyao Huang <lhuang(a)redhat.com&gt; --- src/lxc/lxc_cgroup.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/lxc/lxc_cgroup.c b/src/lxc/lxc_cgroup.c index c1813e2..5e959a2 100644 --- a/src/lxc/lxc_cgroup.c +++ b/src/lxc/lxc_cgroup.c @@ -77,11 +77,15 @@ static int virLXCCgroupSetupCpusetTune(virDomainDefPtr def, if (virCgroupSetCpusetCpus(cgroup, mask) < 0) goto cleanup; + /* free mask to make sure we won't use it in a wrong way later */ + VIR_FREE(mask); } if (virDomainNumatuneGetMode(def->numa, -1) != - VIR_DOMAIN_NUMATUNE_MEM_STRICT) + VIR_DOMAIN_NUMATUNE_MEM_STRICT) { + ret = 0; goto cleanup; + } if (virDomainNumatuneMaybeFormatNodeset(def->numa, nodemask, &mask, -1) < 0) -- 1.8.3.1