[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

[libvirt] [PATCH 4/5] S390: Fixed core identification for s390

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>
 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,

         /* 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);


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

[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]