sched: disable forced preemption by default

[linux-2.6-omap-h63xx.git] / kernel / lockdep_proc.c

diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index e682926c9ad6dcc74d988e8c878d030c535f1ab9..c851b2dcc685cc91db6bf16838aaab556517878e 100644 (file)
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -5,7 +5,8 @@
  *
  * Started by Ingo Molnar:
  *
- *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
+ *  Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
+ *  Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
  *
  * Code for /proc/lockdep and /proc/lockdep_stats:
  *
@@ -345,7 +346,7 @@ static const struct file_operations proc_lockdep_stats_operations = {
        .open           = lockdep_stats_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
-       .release        = seq_release,
+       .release        = single_release,
 };
 
 #ifdef CONFIG_LOCK_STAT
@@ -420,8 +421,30 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
        class = data->class;
        stats = &data->stats;
 
-       snprintf(name, 38, "%s", class->name);
+       namelen = 38;
+       if (class->name_version > 1)
+               namelen -= 2; /* XXX truncates versions > 9 */
+       if (class->subclass)
+               namelen -= 2;
+
+       if (!class->name) {
+               char str[KSYM_NAME_LEN];
+               const char *key_name;
+
+               key_name = __get_key_name(class->key, str);
+               snprintf(name, namelen, "%s", key_name);
+       } else {
+               snprintf(name, namelen, "%s", class->name);
+       }
        namelen = strlen(name);
+       if (class->name_version > 1) {
+               snprintf(name+namelen, 3, "#%d", class->name_version);
+               namelen += 2;
+       }
+       if (class->subclass) {
+               snprintf(name+namelen, 3, "/%d", class->subclass);
+               namelen += 2;
+       }
 
        if (stats->write_holdtime.nr) {
                if (stats->read_holdtime.nr)
@@ -429,16 +452,18 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
                else
                        seq_printf(m, "%40s:", name);
 
+               seq_printf(m, "%14lu ", stats->bounces[bounce_contended_write]);
                seq_lock_time(m, &stats->write_waittime);
-               seq_puts(m, " ");
+               seq_printf(m, " %14lu ", stats->bounces[bounce_acquired_write]);
                seq_lock_time(m, &stats->write_holdtime);
                seq_puts(m, "\n");
        }
 
        if (stats->read_holdtime.nr) {
                seq_printf(m, "%38s-R:", name);
+               seq_printf(m, "%14lu ", stats->bounces[bounce_contended_read]);
                seq_lock_time(m, &stats->read_waittime);
-               seq_puts(m, " ");
+               seq_printf(m, " %14lu ", stats->bounces[bounce_acquired_read]);
                seq_lock_time(m, &stats->read_holdtime);
                seq_puts(m, "\n");
        }
@@ -468,26 +493,29 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
        }
        if (i) {
                seq_puts(m, "\n");
-               seq_line(m, '.', 0, 40 + 1 + 8 * (14 + 1));
+               seq_line(m, '.', 0, 40 + 1 + 10 * (14 + 1));
                seq_puts(m, "\n");
        }
 }
 
 static void seq_header(struct seq_file *m)
 {
-       seq_printf(m, "lock_stat version 0.1\n");
-       seq_line(m, '-', 0, 40 + 1 + 8 * (14 + 1));
-       seq_printf(m, "%40s %14s %14s %14s %14s %14s %14s %14s %14s\n",
+       seq_printf(m, "lock_stat version 0.2\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",
                        "class name",
+                       "con-bounces",
                        "contentions",
                        "waittime-min",
                        "waittime-max",
                        "waittime-total",
+                       "acq-bounces",
                        "acquisitions",
                        "holdtime-min",
                        "holdtime-max",
                        "holdtime-total");
-       seq_line(m, '-', 0, 40 + 1 + 8 * (14 + 1));
+       seq_line(m, '-', 0, 40 + 1 + 10 * (14 + 1));
        seq_printf(m, "\n");
 }
 
@@ -498,6 +526,9 @@ static void *ls_start(struct seq_file *m, loff_t *pos)
        if (data->iter == data->stats)
                seq_header(m);
 
+       if (data->iter == data->iter_end)
+               data->iter = NULL;
+
        return data->iter;
 }