)]}' { "commit": "2aa14b1ab2c41a4fe41efae80d58bb77da91f19f", "tree": "17f83bdf97a2a93f8d0aa4d5daf6a92caa7bde79", "parents": [ "4782c725c1538aa9ef894ae4a3938db40be7f02c" ], "author": { "name": "Nick Terrell", "email": "terrelln@fb.com", "time": "Mon Oct 17 13:32:37 2022 -0700" }, "committer": { "name": "Nick Terrell", "email": "terrelln@fb.com", "time": "Mon Oct 24 12:12:32 2022 -0700" }, "message": "zstd: import usptream v1.5.2\n\nUpdates the kernel\u0027s zstd library to v1.5.2, the latest zstd release.\nThe upstream tag it is updated to is `v1.5.2-kernel`, which contains\nseveral cherry-picked commits on top of the v1.5.2 release which are\nrequired for the kernel update. I will create this tag once the PR is\nready to merge, until then reference the temporary upstream branch\n`v1.5.2-kernel-cherrypicks`.\n\nI plan to submit this patch as part of the v6.2 merge window.\n\nI\u0027ve done basic build testing \u0026 testing on x86-64, i386, and aarch64.\nI\u0027m merging these patches into my `zstd-next` branch, which is pulled\ninto `linux-next` for further testing.\n\nI\u0027ve benchmarked BtrFS with zstd compression on a x86-64 machine, and\nsaw these results. Decompression speed is a small win across the board.\nThe lower compression levels 1-4 see both compression speed and\ncompression ratio wins. The higher compression levels see a small\ncompression speed loss and about neutral ratio. I expect the lower\ncompression levels to be used much more heavily than the high\ncompression levels, so this should be a net win.\n\nLevel\tCTime\tDTime\tRatio\n1\t-2.95%\t-1.1%\t-0.7%\n3\t-3.5%\t-1.2%\t-0.5%\n5\t+3.7%\t-1.0%\t+0.0%\n7\t+3.2%\t-0.9%\t+0.0%\n9\t-4.3%\t-0.8%\t+0.1%\n\nSigned-off-by: Nick Terrell \u003cterrelln@fb.com\u003e\n", "tree_diff": [ { "type": "modify", "old_id": "6b91758b61af92b8e91286097f287f464418ca6c", "old_mode": 33188, "old_path": "include/linux/zstd_lib.h", "new_id": "79d55465d5c1d60d4a65f108fb8ef59ec984c081", "new_mode": 33188, "new_path": "include/linux/zstd_lib.h" }, { "type": "modify", "old_id": "28248abe8612a975d2a462a8b32e73d7a46e3e39", "old_mode": 33188, "old_path": "lib/zstd/common/bitstream.h", "new_id": "feef3a1b1d6002885864f3b76a58fc38b3f38f17", "new_mode": 33188, "new_path": "lib/zstd/common/bitstream.h" }, { "type": "modify", "old_id": "f5a9c70a228a2bb204c5325f24a997d27139df97", "old_mode": 33188, "old_path": "lib/zstd/common/compiler.h", 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