For the s390x architecture the sysfs core_id alone is not unique. As a result it can happen that libvirt thinks there are less host CPUs available than really present. Currently, a logical CPU is equivalent to a core for s390x. We therefore produce a fake core id from the CPU number. Signed-off-by: Viktor Mihajlovski <mihajlov(a)linux.vnet.ibm.com&gt; --- src/nodeinfo.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/src/nodeinfo.c b/src/nodeinfo.c index 7eb5ae5..819f954 100644 --- a/src/nodeinfo.c +++ b/src/nodeinfo.c @@ -355,7 +355,13 @@ int linuxNodeInfoCPUPopulate(FILE *cpuinfo, nodeinfo->cpus++; /* Parse core */ +# if defined(__s390__) || \ + defined(__s390x__) + /* logical cpu is equivalent to a core on s390 */ + core = cpu; +# else core = virNodeGetCpuValue(sysfs_cpudir, cpu, "topology/core_id", false); +# endif if (!CPU_ISSET(core, &core_mask)) { CPU_SET(core, &core_mask); nodeinfo->cores++; -- 1.7.0.4 -- Mit freundlichen Grüßen/Kind Regards Viktor Mihajlovski IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen Registergericht: Amtsgericht Stuttgart, HRB 243294