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Btrfs: advance window_start if we're using a bitmap
If we span a long area in a bitmap we could end up taking a lot of time searching to the next free area if we're searching from the original window_start, so advance window_start in order to make sure we don't do any superficial searching. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -2251,6 +2251,7 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
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offset_index);
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continue;
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}
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cluster->window_start += bytes;
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} else {
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ret = entry->offset;
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