zstd_max_clevel(9)

💅 zstd_max_clevel(9) — like, the whole vibe

okay so bestie, we're in the Kernel API Manual today and this page is literally about the tiniest little function that answers one giant question: what's the highest compression level the kernel's zstd will even let you ask for? 👑 It's zstd_max_clevel and she is short, she is sweet, she is the ceiling of your compression dreams. 🎀

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✨ NAME ✨

zstd_max_clevel — the maximum allowed compression level, periodt. 💖

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🌸 SYNOPSIS 🌸

int zstd_max_clevel (void );

like, that's it. that's the whole function. no cap. ✨

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🦋 ARGUMENTS 🦋

• void — no arguments, none, zero, nothing. she takes nothing from you and gives you a number back. main character energy fr fr 💅

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⭐ RETURN ⭐

returns the maximum allowed compression level. that's the whole return value, that's the whole story, go off queen 👑

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💜 SEE ALSO 💜

okay this is the part where the whole zstd friend group shows up, and honestly? iconic. 🫶 the header lives in ./include/linux/zstd.h under the kernel file tree, and here's everyone:

• zstd_compress_bound(9)
• zstd_is_error(9)
• zstd_get_error_code(9)
• zstd_get_error_name(9)
• zstd_min_clevel(9)
• zstd_default_clevel(9)
• zstd_get_params(9)
• zstd_get_cparams(9)
• zstd_cctx_set_param(9)
• zstd_cctx_workspace_bound(9)
• zstd_cctx_workspace_bound_with_ext_seq_prod(9)
• zstd_init_cctx(9)
• zstd_compress_cctx(9)
• zstd_create_cctx_advanced(9)
• zstd_free_cctx(9)
• zstd_create_cdict_byreference(9)
• zstd_free_cdict(9)
• zstd_compress_using_cdict(9)
• zstd_dctx_workspace_bound(9)
• zstd_init_dctx(9)
• zstd_decompress_dctx(9)
• zstd_create_ddict_byreference(9)
• zstd_free_ddict(9)
• zstd_create_dctx_advanced(9)
• zstd_free_dctx(9)
• zstd_decompress_using_ddict(9)
• zstd_cstream_workspace_bound(9)
• zstd_cstream_workspace_bound_with_ext_seq_prod(9)
• zstd_init_cstream(9)
• zstd_reset_cstream(9)
• zstd_compress_stream(9)
• zstd_flush_stream(9)
• zstd_end_stream(9)
• zstd_dstream_workspace_bound(9)
• zstd_init_dstream(9)
• zstd_reset_dstream(9)
• zstd_decompress_stream(9)
• zstd_find_frame_compressed_size(9)
• zstd_get_frame_header(9)
• zstd_compress_sequences_and_literals(9)

like, that's the whole squad. iykyk. 🌈

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ngl the only thing she does is hand you the max compression level and dip — no side effects, no drama, no surprises. a lowkey legend. 💀💖

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aaaand that's the page!! this little cutie ships from the source tree at ./include/linux and she's dated October 2026 — so like, future girlie behaviour honestly 🌸🦋 mwah, bye bestie!! 💅✨🎀