linux-kernel - [PATCH 0/2] lib,crypto: Add lz4 compressor module and crypto API

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Message-ID: <CAOAMb1D+h8BRu=YWQ9dJ3JN-5CmmDLjgq1mLnnCH9TELrPx2bw@mail.gmail.com>
Date:	Thu, 14 Mar 2013 18:48:20 +0900
From:	Chanho Min <chanho.min@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	"Darrick J. Wong" <djwong@...ibm.com>,
	Bob Pearson <rpearson@...temfabricworks.com>,
	Richard Weinberger <richard@....at>,
	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
	Yann Collet <yann.collet.73@...il.com>,
	Kyungsik Lee <kyungsik.lee@....com>,
	Chanho Min <chanho0207@...il.com>
Subject: [PATCH 0/2] lib,crypto: Add lz4 compressor module and crypto API

This patchset is for supporting LZ4 compression and the crypto API using it.
This should be applied after the previous Kyungsik's "LZ4 compressed kernel"
patches - https://lkml.org/lkml/2013/3/5/181.

As shown in bellow result, the size of data is a little bit bigger but
compressing speed is faster under the enabled unaligned memory access.
We can use lz4 de/compression through crypto API as well. Also,
It will be useful for another potential user of lz4 compression.

lz4 Compression Benchmark:
Compiler: ARM gcc 4.6.4
ARMv7, 1 GHz based board
   Kernel: linux 3.4
   Uncompressed data Size: 101 MB
         Compressed Size  compression Speed
   LZO   72.1MB		  32.1MB/s, 33.0MB/s(UA)
   LZ4   75.1MB		  30.4MB/s, 35.9MB/s(UA)
   LZ4HC 59.8MB		   2.4MB/s,  2.5MB/s(UA)
- UA: Unaligned memory Access support
- Latest patch set for LZO applied

Chanho Min (2):
  lib: Add lz4 compressor module
  crypto: Add lz4 Cryptographic API

 crypto/Kconfig           |   16 ++
 crypto/Makefile          |    2 +
 crypto/lz4.c             |  105 +++++++++
 crypto/lz4hc.c           |  105 +++++++++
 include/linux/lz4.h      |   36 ++++
 lib/Kconfig              |    6 +
 lib/Makefile             |    2 +
 lib/lz4/Makefile         |    2 +
 lib/lz4/lz4_compress.c   |  443 +++++++++++++++++++++++++++++++++++++
 lib/lz4/lz4defs.h        |   66 +++++-
 lib/lz4/lz4hc_compress.c |  539 ++++++++++++++++++++++++++++++++++++++++++++++
 11 files changed, 1320 insertions(+), 2 deletions(-)
 create mode 100644 crypto/lz4.c
 create mode 100644 crypto/lz4hc.c
 create mode 100644 lib/lz4/lz4_compress.c
 create mode 100644 lib/lz4/lz4hc_compress.c

-- 
1.7.9.5
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