powerpc/pseries: Add CMO paging statistics
With the addition of Cooperative Memory Overcommitment (CMO) support
for IBM Power Systems, two fields have been added to the VPA to report
paging statistics. Add support in lparcfg to report them to userspace.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index d82e1fa..848c3e5 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -409,6 +409,25 @@
return count;
}
+static void pseries_cmo_data(struct seq_file *m)
+{
+ int cpu;
+ unsigned long cmo_faults = 0;
+ unsigned long cmo_fault_time = 0;
+
+ if (!firmware_has_feature(FW_FEATURE_CMO))
+ return;
+
+ for_each_possible_cpu(cpu) {
+ cmo_faults += lppaca[cpu].cmo_faults;
+ cmo_fault_time += lppaca[cpu].cmo_fault_time;
+ }
+
+ seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
+ seq_printf(m, "cmo_fault_time_usec=%lu\n",
+ cmo_fault_time / tb_ticks_per_usec);
+}
+
static int pseries_lparcfg_data(struct seq_file *m, void *v)
{
int partition_potential_processors;
@@ -434,6 +453,7 @@
parse_system_parameter_string(m);
parse_ppp_data(m);
parse_mpp_data(m);
+ pseries_cmo_data(m);
seq_printf(m, "purr=%ld\n", get_purr());
} else { /* non SPLPAR case */