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S390: Fixed core identification for s390

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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@linux.vnet.ibm.com>
This commit is contained in:
Viktor Mihajlovski 2012-06-22 13:50:13 +02:00 committed by Michal Privoznik
parent bf2e40fac0
commit 2abbffec6e
1 changed files with 6 additions and 0 deletions
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6
src/nodeinfo.c
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@ -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++;