aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/kernel
diff options
context:
space:
mode:
authorBrian King <brking@linux.vnet.ibm.com>2008-07-24 04:30:58 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-25 15:44:42 +1000
commitffa5abbd0c399b32fc13a1b4718d87ee7a716999 (patch)
tree79e2136b4de01bee9c5f8f8cee23823a801b8972 /arch/powerpc/kernel
parent84af458bb23bf5f0ba1af4320dd2a57f7c4363e5 (diff)
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>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/lparcfg.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index d82e1fa5ce2..848c3e5a637 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -409,6 +409,25 @@ static int lparcfg_count_active_processors(void)
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 @@ static int pseries_lparcfg_data(struct seq_file *m, void *v)
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 */