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-rw-r--r--fs/btrfs/volumes.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 2ceb924ca0d6..b2d05c6b1c56 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4829,10 +4829,13 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
ndevs = min(ndevs, devs_max);
/*
- * the primary goal is to maximize the number of stripes, so use as many
- * devices as possible, even if the stripes are not maximum sized.
+ * The primary goal is to maximize the number of stripes, so use as
+ * many devices as possible, even if the stripes are not maximum sized.
+ *
+ * The DUP profile stores more than one stripe per device, the
+ * max_avail is the total size so we have to adjust.
*/
- stripe_size = devices_info[ndevs-1].max_avail;
+ stripe_size = div_u64(devices_info[ndevs - 1].max_avail, dev_stripes);
num_stripes = ndevs * dev_stripes;
/*
@@ -4867,8 +4870,6 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
stripe_size = devices_info[ndevs-1].max_avail;
}
- stripe_size = div_u64(stripe_size, dev_stripes);
-
/* align to BTRFS_STRIPE_LEN */
stripe_size = round_down(stripe_size, BTRFS_STRIPE_LEN);