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UPSTREAM: lz4: fix wrong compress buffer size for 64-bits 

(cherry picked from commit 06af1c52c9ea234e0b1266cc0b52c3e0c6c8fe9f)

The current lz4 compress buffer is 16kb on 32-bits, 32kb on 64-bits
system.  But, lz4 needs only 16kb on both.  On 64-bits, this causes
wasted cpu cycles for additional memset during every compression.

In case of lz4hc, the current buffer size is (256kb + 8) on 32-bits,
(512kb + 16) on 64-bits.  But, lz4hc needs only (256kb + 2 * pointer) on
both.

This patch fixes these wrong compress buffer sizes for 64-bits.

Change-Id: Ic686085c21f12cf6c6378caad8ea9884fb27a0c8
Signed-off-by: Bongkyu Kim <bongkyu.kim@lge.com>
Cc: Chanho Min <chanho.min@lge.com>
Cc: Yann Collet <yann.collet.73@gmail.com>
Cc: Kyungsik Lee <kyungsik.lee@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bongkyu Kim 2016-01-20 15:01:08 -08:00 committed by syphyr
parent 24c6585a86
commit 549df4abd7
1 changed files with 2 additions and 2 deletions
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4
include/linux/lz4.h
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@ -9,8 +9,8 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define LZ4_MEM_COMPRESS (4096 * sizeof(unsigned char *))
#define LZ4HC_MEM_COMPRESS (65538 * sizeof(unsigned char *))
#define LZ4_MEM_COMPRESS (16384)
#define LZ4HC_MEM_COMPRESS (262144 + (2 * sizeof(unsigned char *)))
/*
* lz4_compressbound()