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nixos/zfs: disable redundant scheduler

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I (according to the comment) wrote this somewhere and since then it has
spread to many configs.

https://github.com/search?q=artturin+ENV%7BID_FS_TYPE%7D%3D%3D%22zfs_member%22%2C+ATTR%7B..%2Fqueue%2Fscheduler%7D%3D%22none%22&type=code

https://github.com/NixOS/nixpkgs/issues/169457#issuecomment-1523873402
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Artturin 2023-08-20 10:40:24 +03:00 committed by Jörg Thalheim
parent 8e32f5b91d
commit 696353fcf4
1 changed files with 5 additions and 0 deletions
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5
nixos/modules/tasks/filesystems/zfs.nix
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@ -662,6 +662,11 @@ in
];
};
# ZFS already has its own scheduler. Without this my(@Artturin) computer froze for a second when I nix build something.
services.udev.extraRules = ''
ACTION=="add|change", KERNEL=="sd[a-z]*[0-9]*|mmcblk[0-9]*p[0-9]*|nvme[0-9]*n[0-9]*p[0-9]*", ENV{ID_FS_TYPE}=="zfs_member", ATTR{../queue/scheduler}="none"
'';
environment.etc = genAttrs
(map
(file: "zfs/zed.d/${file}")