diff options
Diffstat (limited to 'usr/src')
| -rw-r--r-- | usr/src/uts/common/fs/zfs/lz4.c | 23 |
1 files changed, 8 insertions, 15 deletions
diff --git a/usr/src/uts/common/fs/zfs/lz4.c b/usr/src/uts/common/fs/zfs/lz4.c index f710348fed..cc73a4eb8c 100644 --- a/usr/src/uts/common/fs/zfs/lz4.c +++ b/usr/src/uts/common/fs/zfs/lz4.c @@ -197,20 +197,17 @@ lz4_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n) defined(__amd64) || defined(__ppc64__) || defined(_WIN64) || \ defined(__LP64__) || defined(_LP64)) #define LZ4_ARCH64 1 -/* - * Illumos: On amd64 we have 20k of stack and 24k on sun4u and sun4v, so we - * can spend 16k on the algorithm - */ -#define STACKLIMIT 12 #else #define LZ4_ARCH64 0 +#endif + /* - * Illumos: On i386 we only have 12k of stack, so in order to maintain the - * same COMPRESSIONLEVEL we have to use heap allocation. Performance will - * suck, but alas, it's ZFS on 32-bit we're talking about, so... + * Limits the amount of stack space that the algorithm may consume to hold + * the compression lookup table. The value `9' here means we'll never use + * more than 2k of stack (see above for a description of COMPRESSIONLEVEL). + * If more memory is needed, it is allocated from the heap. */ -#define STACKLIMIT 11 -#endif +#define STACKLIMIT 9 /* * Little Endian or Big Endian? @@ -240,11 +237,7 @@ lz4_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n) #define LZ4_FORCE_UNALIGNED_ACCESS 1 #endif -/* - * Illumos: we can't use GCC's __builtin_ctz family of builtins in the - * kernel - */ -#define LZ4_FORCE_SW_BITCOUNT +/* #define LZ4_FORCE_SW_BITCOUNT */ /* * Compiler Options |