From 2aa14b1ab2c41a4fe41efae80d58bb77da91f19f Mon Sep 17 00:00:00 2001 From: Nick Terrell Date: Mon, 17 Oct 2022 13:32:37 -0700 Subject: zstd: import usptream v1.5.2 Updates the kernel's zstd library to v1.5.2, the latest zstd release. The upstream tag it is updated to is `v1.5.2-kernel`, which contains several cherry-picked commits on top of the v1.5.2 release which are required for the kernel update. I will create this tag once the PR is ready to merge, until then reference the temporary upstream branch `v1.5.2-kernel-cherrypicks`. I plan to submit this patch as part of the v6.2 merge window. I've done basic build testing & testing on x86-64, i386, and aarch64. I'm merging these patches into my `zstd-next` branch, which is pulled into `linux-next` for further testing. I've benchmarked BtrFS with zstd compression on a x86-64 machine, and saw these results. Decompression speed is a small win across the board. The lower compression levels 1-4 see both compression speed and compression ratio wins. The higher compression levels see a small compression speed loss and about neutral ratio. I expect the lower compression levels to be used much more heavily than the high compression levels, so this should be a net win. Level CTime DTime Ratio 1 -2.95% -1.1% -0.7% 3 -3.5% -1.2% -0.5% 5 +3.7% -1.0% +0.0% 7 +3.2% -0.9% +0.0% 9 -4.3% -0.8% +0.1% Signed-off-by: Nick Terrell --- lib/zstd/decompress/zstd_decompress_block.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'lib/zstd/decompress/zstd_decompress_block.h') diff --git a/lib/zstd/decompress/zstd_decompress_block.h b/lib/zstd/decompress/zstd_decompress_block.h index e7f5f6689459..3d2d57a5d25a 100644 --- a/lib/zstd/decompress/zstd_decompress_block.h +++ b/lib/zstd/decompress/zstd_decompress_block.h @@ -33,6 +33,12 @@ */ + /* Streaming state is used to inform allocation of the literal buffer */ +typedef enum { + not_streaming = 0, + is_streaming = 1 +} streaming_operation; + /* ZSTD_decompressBlock_internal() : * decompress block, starting at `src`, * into destination buffer `dst`. @@ -41,7 +47,7 @@ */ size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, - const void* src, size_t srcSize, const int frame); + const void* src, size_t srcSize, const int frame, const streaming_operation streaming); /* ZSTD_buildFSETable() : * generate FSE decoding table for one symbol (ll, ml or off) @@ -54,7 +60,7 @@ size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx, */ void ZSTD_buildFSETable(ZSTD_seqSymbol* dt, const short* normalizedCounter, unsigned maxSymbolValue, - const U32* baseValue, const U32* nbAdditionalBits, + const U32* baseValue, const U8* nbAdditionalBits, unsigned tableLog, void* wksp, size_t wkspSize, int bmi2); -- cgit v1.2.3