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Commit 01dea1ef authored by Josef Bacik's avatar Josef Bacik Committed by Chris Mason
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Btrfs: fix how we set max_size for free space clusters 



This patch fixes a problem where max_size can be set to 0 even though we
filled the cluster properly.  We set max_size to 0 if we restart the cluster
window, but if the new start entry is big enough to be our new cluster then we
could return with a max_size set to 0, which will mean the next time we try to
allocate from this cluster it will fail.  So set max_extent to the entry's
size.  Tested this on my box and now we actually allocate from the cluster
after we fill it.  Thanks,

Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 249ac1e5

fs/btrfs/free-space-cache.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -1296,7 +1296,7 @@ int btrfs_find_space_cluster(struct btrfs_trans_handle *trans, 
			window_start = entry->offset;

			window_start = entry->offset;

			window_free = entry->bytes;

			window_free = entry->bytes;

			last = entry;

			last = entry;

			max_extent = 0;

			max_extent = entry->bytes;

		} else {

		} else {

			last = next;

			last = next;

			window_free += next->bytes;

			window_free += next->bytes;