Status: ok

Add some debugging to track raid5 hang problem


Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./drivers/md/raid5.c |   20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff ./drivers/md/raid5.c~current~ ./drivers/md/raid5.c
--- ./drivers/md/raid5.c~current~	2006-05-23 12:28:53.000000000 +1000
+++ ./drivers/md/raid5.c	2006-05-23 12:29:05.000000000 +1000
@@ -1807,9 +1807,23 @@ static ssize_t
 stripe_cache_active_show(mddev_t *mddev, char *page)
 {
 	raid5_conf_t *conf = mddev_to_conf(mddev);
-	if (conf)
-		return sprintf(page, "%d\n", atomic_read(&conf->active_stripes));
-	else
+	if (conf) {
+		int n;
+		int c1, c2;
+		struct list_head *l;
+		n = sprintf(page, "%d\n", atomic_read(&conf->active_stripes));
+		n += sprintf(page+n, "%d preread\n", atomic_read(&conf->preread_active_stripes));
+		spin_lock_irq(&conf->device_lock);
+		c1=0;
+		list_for_each(l, &conf->bitmap_list)
+			c1++;
+		c2=0;
+		list_for_each(l, &conf->delayed_list)
+			c2++;
+		spin_unlock_irq(&conf->device_lock);
+		n += sprintf(page+n, "bitlist=%d delaylist=%d\n", c1, c2);
+		return n;
+	} else
 		return 0;
 }