Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh64-2.6

[pandora-kernel.git] / drivers / md / multipath.c

diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 96f7af4..171ff41 100644 (file)
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -35,18 +35,6 @@
 #define        NR_RESERVED_BUFS        32
 
 
-static void *mp_pool_alloc(gfp_t gfp_flags, void *data)
-{
-       struct multipath_bh *mpb;
-       mpb = kzalloc(sizeof(*mpb), gfp_flags);
-       return mpb;
-}
-
-static void mp_pool_free(void *mpb, void *data)
-{
-       kfree(mpb);
-}
-
 static int multipath_map (multipath_conf_t *conf)
 {
        int i, disks = conf->raid_disks;
@@ -240,6 +228,28 @@ static int multipath_issue_flush(request_queue_t *q, struct gendisk *disk,
        rcu_read_unlock();
        return ret;
 }
+static int multipath_congested(void *data, int bits)
+{
+       mddev_t *mddev = data;
+       multipath_conf_t *conf = mddev_to_conf(mddev);
+       int i, ret = 0;
+
+       rcu_read_lock();
+       for (i = 0; i < mddev->raid_disks ; i++) {
+               mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
+               if (rdev && !test_bit(Faulty, &rdev->flags)) {
+                       request_queue_t *q = bdev_get_queue(rdev->bdev);
+
+                       ret |= bdi_congested(&q->backing_dev_info, bits);
+                       /* Just like multipath_map, we just check the
+                        * first available device
+                        */
+                       break;
+               }
+       }
+       rcu_read_unlock();
+       return ret;
+}
 
 /*
  * Careful, this can execute in IRQ contexts as well!
@@ -265,7 +275,7 @@ static void multipath_error (mddev_t *mddev, mdk_rdev_t *rdev)
                        char b[BDEVNAME_SIZE];
                        clear_bit(In_sync, &rdev->flags);
                        set_bit(Faulty, &rdev->flags);
-                       mddev->sb_dirty = 1;
+                       set_bit(MD_CHANGE_DEVS, &mddev->flags);
                        conf->working_disks--;
                        printk(KERN_ALERT "multipath: IO failure on %s,"
                                " disabling IO path. \n Operation continuing"
@@ -482,7 +492,6 @@ static int multipath_run (mddev_t *mddev)
        }
 
        conf->raid_disks = mddev->raid_disks;
-       mddev->sb_dirty = 1;
        conf->mddev = mddev;
        spin_lock_init(&conf->device_lock);
        INIT_LIST_HEAD(&conf->retry_list);
@@ -494,9 +503,8 @@ static int multipath_run (mddev_t *mddev)
        }
        mddev->degraded = conf->raid_disks = conf->working_disks;
 
-       conf->pool = mempool_create(NR_RESERVED_BUFS,
-                                   mp_pool_alloc, mp_pool_free,
-                                   NULL);
+       conf->pool = mempool_create_kzalloc_pool(NR_RESERVED_BUFS,
+                                                sizeof(struct multipath_bh));
        if (conf->pool == NULL) {
                printk(KERN_ERR 
                        "multipath: couldn't allocate memory for %s\n",
@@ -523,6 +531,8 @@ static int multipath_run (mddev_t *mddev)
 
        mddev->queue->unplug_fn = multipath_unplug;
        mddev->queue->issue_flush_fn = multipath_issue_flush;
+       mddev->queue->backing_dev_info.congested_fn = multipath_congested;
+       mddev->queue->backing_dev_info.congested_data = mddev;
 
        return 0;