[Backport release-23.11] zfs: default disable zfs_dmu_offset_next_sync to avoid data corruption #270445
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amarshall
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Nov 27, 2023
This helps mitigate a data corruption bug. This was previously defaulted to zero prior to upstream commit 05b3eb6d232009db247882a39d518e7282630753, and it is already a tunable, so doing this seems safe. Initially data corruption was thought to be introduced with v2.2, but further upstream investigation currently believes that changes in v2.2 only exacerbated the issue that already existed. A longer-term fix is likely to be openzfs/zfs#15571, though that is not yet merged. The zfs_2_1 package has already backported that, so do not apply the tunable default change there. Positioning of `extraPatches` is to avoid merge conflicts with NixOS#269097. Patch is nearly identical to the [Gentoo][1] patch, but better patch formatting. See openzfs/zfs#11900 See openzfs/zfs#15526 [1]: https://gitweb.gentoo.org/repo/gentoo.git/tree/sys-fs/zfs-kmod/files/zfs-kmod-2.2.1-Disable-zfs_dmu_offset_next_sync-tunable-by-default.patch (cherry picked from commit 9670ddc)
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amarshall
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Nov 27, 2023
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Description of changes
Manual backport of #270275
Things done
nix.conf? (See Nix manual)sandbox = relaxedsandbox = truenix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage./result/bin/)Priorities
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