zstd · Maintained

Maintainers

• M Nick Terrell <terrelln@fb.com>
• M David Sterba <dsterba@suse.com>

Paths

• F crypto/zstd.c
• F include/linux/zstd*
• F lib/decompress_unzstd.c
• F lib/zstd/

Last 30 days

Most active threads (last 7 days)

• COOLING4d [PATCH v3 0/2] zstd: use x86 feature infrastructure for BMI2 dispatch
  2026-09-01 11:08 · 2 replies in 7d · Usama Arif <usama.arif@linux.dev>

Active reviewers (last 30 days)

• Yosry Ahmed <yosry@kernel.org>
  1 attestation (1 Suggested-by) · last on 2026-08-26

Recent patches

Most-recent 30 patches in this subsystem on linux-crypto (capped at 30), ordered by date desc.

• COOLING4d [PATCH v3 2/2] zstd: use cpu_feature_enabled() for in-kernel BMI2 dispatch
  2026-09-01 · Usama Arif <usama.arif@linux.dev>
• COOLING4d [PATCH v3 1/2] lib/zstd: add fallback aliases for disabled BMI2 variants
  2026-09-01 · Usama Arif <usama.arif@linux.dev>
• COOLING7d [PATCH v2 2/2] zstd: use cpu_feature_enabled() for in-kernel BMI2 dispatch
  2026-08-30 · Usama Arif <usama.arif@linux.dev>
• COOLING7d [PATCH v2 1/2] lib/zstd: add fallback aliases for disabled BMI2 variants
  2026-08-30 · Usama Arif <usama.arif@linux.dev>
• DORMANTno replies Re: [PATCH 0/3] zstd: probe the CPU for BMI2 support once, not per context
  2026-08-27 · Usama Arif <usama.arif@linux.dev>
• COOLING10d [PATCH 3/3] zstd: probe the CPU for BMI2 support only once
  2026-08-26 · Usama Arif <usama.arif@linux.dev>
• COOLING10d [PATCH 2/3] zstd: skip the BMI2 probe when dynamic BMI2 dispatch is disabled
  2026-08-26 · Usama Arif <usama.arif@linux.dev>
• COOLING10d [PATCH 1/3] zstd: use ZSTD_cpuSupportsBmi2() in ZSTD_initStaticCCtx()
  2026-08-26 · Usama Arif <usama.arif@linux.dev>
• DORMANTno replies Re: [PATCH 0/2] crypto: zstd - avoid initializing the workspace twice
  2026-08-26 · Usama Arif <usama.arif@linux.dev>
• COOLING12d [PATCH 2/2] crypto: zstd - Avoid redundant dstream initialization
  2026-08-25 · Usama Arif <usama.arif@linux.dev>
• COOLING12d [PATCH 1/2] crypto: zstd - Avoid redundant cstream initialization
  2026-08-25 · Usama Arif <usama.arif@linux.dev>
• STALE126d [PATCH v2] crypto: zstd - fix segmented acomp streaming paths
  2026-03-20 · Wesley Atwell <hidden>
• STALE170d [PATCH] crypto: zstd - fix segmented acomp streaming paths
  2026-03-09 · Wesley Atwell <hidden>
• STALE207d [PATCH 089/106] crypto: convert exported crypto symbol into pluggable interface for CONFIG_CRYPTO_ZSTD crypto
  2026-02-12 · Jay Wang <hidden>
• STALE277d [RFC PATCH 12/16] crypto: zstd - add support for compression levels
  2025-11-28 · Giovanni Cabiddu <giovanni.cabiddu@intel.com>
• STALE277d [RFC PATCH 10/16] crypto: acomp - add NUMA-aware stream allocation
  2025-11-28 · Giovanni Cabiddu <giovanni.cabiddu@intel.com>
• STALE277d REVIEWED: 1 (0M) [RFC PATCH 01/16] crypto: zstd - fix double-free in per-CPU stream cleanup
  2025-11-28 · Giovanni Cabiddu <giovanni.cabiddu@intel.com>
• STALE287d REVIEWED: 1 (0M) [PATCH] crypto: zstd - fix double-free in per-CPU stream cleanup
  2025-11-20 · Giovanni Cabiddu <giovanni.cabiddu@intel.com>
• STALE297d [PATCH] crypto: zstd - Remove unnecessary size_t cast
  2025-11-08 · Thorsten Blum <hidden>
• STALE297d [PATCH] crypto: zstd - Annotate struct zstd_ctx with __counted_by
  2025-11-08 · Thorsten Blum <hidden>
• STALE341d [PATCH] crypto: zstd - Fix compression bug caused by truncation
  2025-09-30 · Herbert Xu <herbert@gondor.apana.org.au>
• STALE352d [PATCH v3] crypto: acomp/scomp: Use same definition of context alloc and free ops
  2025-09-07 · Dan Moulding <hidden>
• STALE352d [PATCH v2] crypto: acomp: Use shared struct for context alloc and free ops
  2025-08-30 · Dan Moulding <hidden>
• STALE416d [PATCH] crypto: acomp - Fix CFI failure due to type punning
  2025-07-09 · Eric Biggers <ebiggers@kernel.org>
• STALE424d [PATCH] crypto: zstd - replace zero-length array with flexible array member
  2025-07-03 · Thorsten Blum <hidden>
• STALE424d REVIEWED: 2 (2M) [PATCH] crypto: zstd - fix duplicate check warning
  2025-06-30 · Suman Kumar Chakraborty <hidden>
• STALE441d REVIEWED: 2 (2M) [PATCH v7] crypto: zstd - convert to acomp
  2025-06-16 · Suman Kumar Chakraborty <hidden>
• STALE451d REVIEWED: 2 (2M) [PATCH v6] crypto: zstd - convert to acomp
  2025-06-04 · Suman Kumar Chakraborty <hidden>
• STALE465d REVIEWED: 2 (2M) [v5] crypto: zstd - convert to acomp
  2025-05-27 · Suman Kumar Chakraborty <hidden>
• STALE468d REVIEWED: 2 (2M) [v4] crypto: zstd - convert to acomp
  2025-05-27 · Suman Kumar Chakraborty <hidden>

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE207d [PATCH 089/106] crypto: convert exported crypto symbol into pluggable interface for CONFIG_CRYPTO_ZSTD crypto
  2026-02-12 · Jay Wang <hidden>