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btrfs: compression: remove dead comments in btrfs_compress_heuristic()
Since commit a440d48c7f
("Btrfs: heuristic: implement sampling
logic"), btrfs_compress_heuristic() is no longer a simple "return true",
but more complex to determine if we should compress.
Thus the comment is dead and can be confusing, just remove it.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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@ -1476,11 +1476,6 @@ static void heuristic_collect_sample(struct inode *inode, u64 start, u64 end,
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/*
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* Compression heuristic.
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*
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* For now is's a naive and optimistic 'return true', we'll extend the logic to
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* quickly (compared to direct compression) detect data characteristics
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* (compressible/incompressible) to avoid wasting CPU time on incompressible
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* data.
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*
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* The following types of analysis can be performed:
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* - detect mostly zero data
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* - detect data with low "byte set" size (text, etc)
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