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| author | Ilya Dryomov <idryomov@gmail.com> | 2012-04-13 17:05:08 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.cz> | 2012-04-18 19:22:25 +0200 |
| commit | 37db63a400d3bac467795aa43901065fd8d903b7 (patch) | |
| tree | 6dcafae4fa5e43bccaac3799685b1519575968a2 | |
| parent | b916a59adfdc875381b68ced258694b434cf43ae (diff) | |
| download | linux-37db63a400d3bac467795aa43901065fd8d903b7.tar.bz2 | |
Btrfs: fix max chunk size check in chunk allocator
Fix a bug, where in case we need to adjust stripe_size so that the
length of the resulting chunk is less than or equal to max_chunk_size,
DUP chunks turn out to be only half as big as they could be.
Cc: Arne Jansen <sensille@gmx.net>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
| -rw-r--r-- | fs/btrfs/volumes.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 759d02486d7c..ce289af526f0 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -3324,12 +3324,14 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, stripe_size = devices_info[ndevs-1].max_avail; num_stripes = ndevs * dev_stripes; - if (stripe_size * num_stripes > max_chunk_size * ncopies) { + if (stripe_size * ndevs > max_chunk_size * ncopies) { stripe_size = max_chunk_size * ncopies; - do_div(stripe_size, num_stripes); + do_div(stripe_size, ndevs); } do_div(stripe_size, dev_stripes); + + /* align to BTRFS_STRIPE_LEN */ do_div(stripe_size, BTRFS_STRIPE_LEN); stripe_size *= BTRFS_STRIPE_LEN; |