lockstat: contend with points

We currently only provide points that have to wait on contention, also
lists the points we have to wait for.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 19 insertions, 2 deletions

diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index 8d3a6eba8d5a..13716b813896 100644
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -557,7 +557,7 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
         if (stats->read_holdtime.nr)
                 namelen += 2;
 
-        for (i = 0; i < ARRAY_SIZE(class->contention_point); i++) {
+        for (i = 0; i < LOCKSTAT_POINTS; i++) {
                 char sym[KSYM_SYMBOL_LEN];
                 char ip[32];
 
@@ -574,6 +574,23 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
                                 stats->contention_point[i],
                                 ip, sym);
         }
+        for (i = 0; i < LOCKSTAT_POINTS; i++) {
+                char sym[KSYM_SYMBOL_LEN];
+                char ip[32];
+
+                if (class->contending_point[i] == 0)
+                        break;
+
+                if (!i)
+                        seq_line(m, '-', 40-namelen, namelen);
+
+                sprint_symbol(sym, class->contending_point[i]);
+                snprintf(ip, sizeof(ip), "[<%p>]",
+                                (void *)class->contending_point[i]);
+                seq_printf(m, "%40s %14lu %29s %s\n", name,
+                                stats->contending_point[i],
+                                ip, sym);
+        }
         if (i) {
                 seq_puts(m, "\n");
                 seq_line(m, '.', 0, 40 + 1 + 10 * (14 + 1));
@@ -583,7 +600,7 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
 
 static void seq_header(struct seq_file *m)
 {
-        seq_printf(m, "lock_stat version 0.2\n");
+        seq_printf(m, "lock_stat version 0.3\n");
         seq_line(m, '-', 0, 40 + 1 + 10 * (14 + 1));
         seq_printf(m, "%40s %14s %14s %14s %14s %14s %14s %14s %14s "
                         "%14s %14s\n",