dm snapshot: use merge origin if snapshot invalid

[safe/jmp/linux-2.6] / drivers / md / raid10.c

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 7872968..c2cb7b8 100644 (file)
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -68,7 +68,7 @@ static void * r10bio_pool_alloc(gfp_t gfp_flags, void *data)
 
        /* allocate a r10bio with room for raid_disks entries in the bios array */
        r10_bio = kzalloc(size, gfp_flags);
-       if (!r10_bio)
+       if (!r10_bio && conf->mddev)
                unplug_slaves(conf->mddev);
 
        return r10_bio;
@@ -631,6 +631,8 @@ static int raid10_congested(void *data, int bits)
        conf_t *conf = mddev->private;
        int i, ret = 0;
 
+       if (mddev_congested(mddev, bits))
+               return 1;
        rcu_read_lock();
        for (i = 0; i < mddev->raid_disks && ret == 0; i++) {
                mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
@@ -882,7 +884,7 @@ static int make_request(struct request_queue *q, struct bio * bio)
                        mirror->rdev->data_offset;
                read_bio->bi_bdev = mirror->rdev->bdev;
                read_bio->bi_end_io = raid10_end_read_request;
-               read_bio->bi_rw = READ | do_sync;
+               read_bio->bi_rw = READ | (do_sync << BIO_RW_SYNCIO);
                read_bio->bi_private = r10_bio;
 
                generic_make_request(read_bio);
@@ -950,7 +952,7 @@ static int make_request(struct request_queue *q, struct bio * bio)
                        conf->mirrors[d].rdev->data_offset;
                mbio->bi_bdev = conf->mirrors[d].rdev->bdev;
                mbio->bi_end_io = raid10_end_write_request;
-               mbio->bi_rw = WRITE | do_sync;
+               mbio->bi_rw = WRITE | (do_sync << BIO_RW_SYNCIO);
                mbio->bi_private = r10_bio;
 
                atomic_inc(&r10_bio->remaining);
@@ -1623,13 +1625,14 @@ static void raid10d(mddev_t *mddev)
                                bio->bi_sector = r10_bio->devs[r10_bio->read_slot].addr
                                        + rdev->data_offset;
                                bio->bi_bdev = rdev->bdev;
-                               bio->bi_rw = READ | do_sync;
+                               bio->bi_rw = READ | (do_sync << BIO_RW_SYNCIO);
                                bio->bi_private = r10_bio;
                                bio->bi_end_io = raid10_end_read_request;
                                unplug = 1;
                                generic_make_request(bio);
                        }
                }
+               cond_resched();
        }
        if (unplug)
                unplug_slaves(mddev);
@@ -2093,7 +2096,6 @@ static int run(mddev_t *mddev)
        if (!conf->tmppage)
                goto out_free_conf;
 
-       conf->mddev = mddev;
        conf->raid_disks = mddev->raid_disks;
        conf->near_copies = nc;
        conf->far_copies = fc;
@@ -2130,6 +2132,7 @@ static int run(mddev_t *mddev)
                goto out_free_conf;
        }
 
+       conf->mddev = mddev;
        spin_lock_init(&conf->device_lock);
        mddev->queue->queue_lock = &conf->device_lock;