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(parent: dd477a2) | patch
Btrfs: heuristic: add detection of repeated data patterns
authorTimofey Titovets <nefelim4ag@gmail.com>
Thu, 28 Sep 2017 14:33:39 +0000 (17:33 +0300)
committerDavid Sterba <dsterba@suse.com>
Wed, 1 Nov 2017 19:45:36 +0000 (20:45 +0100)
commitdf5d2f45936c54b111e576723b7b5c4808789468
treedbe0f0b44b9814655e5b64e8b0cc72db375227b9tree | snapshot
parentdd477a233eb710ce7b97b4cd8d789de43ad1dc01commit | diff
Btrfs: heuristic: add detection of repeated data patterns

Walk over data sample and use memcmp to detect repeated patterns, like
zeros, but a bit more general.

Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ minor coding style fixes ]
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/compression.c diff | blob | history
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