# OpenZFS zfs-2.3.5

- Product: OpenZFS (https://whatsnew.fyi/product/openzfs)
- Vendor: OpenZFS
- Date: 2025-11-18
- Version: zfs-2.3.5
- Original notes: https://github.com/openzfs/zfs/releases/tag/zfs-2.3.5
- Permalink: https://whatsnew.fyi/product/openzfs/releases/zfs-2.3.5
- Labels: Platforms: Linux

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Satisfy ASSERT_VOP_IN_SEQC() on FreeBSD
- **fixed** — Fix ranges to blocks conversion math in BRT
- **changed** — Disable zstd intrinsics
- **fixed** — Fix broken projectquota on Linux 6.17
- **fixed** — Synchronize the update of feature refcount
- **fixed** — Fix asize overflow in zdb verify_livelist_allocs()
- **fixed** — Fix two infinite loops if dmu_prefetch_max set to zero
- **fixed** — Backtrack in dnode_next_offset if lower level does not match
- **fixed** — Verify IO type is supported in zvol
- **fixed** — Fix zvol blk-mq sync
- **added** — Add interface to spa_get_worst_case_min_alloc() function
- **fixed** — Fix shellcheck issues in contrib/initramfs/scripts/zfs
- **fixed** — Fix zpool add safety check corner cases
- **fixed** — Handle d_set_d_op() no longer being available on Linux 6.17

###### Supported Platforms
- **Linux**: compatible with 4.18 - 6.17 kernels
- **FreeBSD**: compatible with releases starting from 13.3+, 14.0+

###### Changes
- FreeBSD: Satisfy ASSERT_VOP_IN_SEQC() #17722
- CI: Update FreeBSD versions and ci-type handling #17896
- BRT: Fix ranges to blocks conversion math #17886 #17915
- zstd: disable intrinsics #17904 #17852
- Linux 6.17 compat: Fix broken projectquota on 6.17 #17884 #17869
- Synchronize the update of feature refcount #17184 #17632
- zdb: Fix asize overflow in verify_livelist_allocs() #17764
- Fix two infinite loops if dmu_prefetch_max set to zero #17692 #17729
- dnode_next_offset: backtrack if lower level does not match #16025 #11196
- zvol: verify IO type is supported #17803
- zvol: Fix blk-mq sync #17761 #17765
- Linux 6.17 compat: META #17789
- Add interface to interface spa_get_worst_case_min_alloc() function #17758
- contrib/initramfs/scripts/zfs: shellcheck fixup #17626
- Fix 'zpool add' safety check corner cases #17780
- Linux 6.17: d_set_d_op() is no longer available #17621
- CI: Fix FreeBSD 15.0 by staying on ALPHA4 due to broken ALPHA5 image #17846
- CI: Switch FreeBSD 15 to 15.0-ALPHA4 and add FreeBSD 16 #17815
- docs: fix a few small typos (#17804)
- CI: Add ZTS -O option, log Setup Testing Machines step #17753
- CI: Switch FreeBSD 15 to 15.0-ALPHA3 #17795
- CI: Remove Buildbot references #17794
- CI: update perf and bpftools with the kernel packages #17791
- CI: Switch FreeBSD 15 to 15.0-ALPHA2 #17749
- CI: Increase setup timeout to 20min, add timestamps #17714
- ci: fix syntax issues in zfs-qemu.yml #17695
- ci: use real head sha instead of GITHUB_SHA when generating CI type #17695
- CI: Increase 'Setup QEMU' timeout to 15 minutes #17697