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/zstd_compress_module.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'lib/zstd/zstd_compress_module.c') diff --git a/lib/zstd/zstd_compress_module.c b/lib/zstd/zstd_compress_module.c index 65548a4bb934..04e1b5c01d9b 100644 --- a/lib/zstd/zstd_compress_module.c +++ b/lib/zstd/zstd_compress_module.c @@ -133,7 +133,11 @@ EXPORT_SYMBOL(zstd_init_cstream); size_t zstd_reset_cstream(zstd_cstream *cstream, unsigned long long pledged_src_size) { - return ZSTD_resetCStream(cstream, pledged_src_size); + if (pledged_src_size == 0) + pledged_src_size = ZSTD_CONTENTSIZE_UNKNOWN; + ZSTD_FORWARD_IF_ERR( ZSTD_CCtx_reset(cstream, ZSTD_reset_session_only) ); + ZSTD_FORWARD_IF_ERR( ZSTD_CCtx_setPledgedSrcSize(cstream, pledged_src_size) ); + return 0; } EXPORT_SYMBOL(zstd_reset_cstream); -- cgit v1.2.3