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fix(kobudai): disable nfsd delegations temporarily to fix old clients #399

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Merged
24apricots merged 2 commits into from
Sep 1, 2026
Merged

fix(kobudai): disable nfsd delegations temporarily to fix old clients #399

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9d1e737
fix(kobudai): disable nfsd delegations temporarily to fix old clients
oliver-ni Aug 18, 2026
cdbc632
Revise comments on NFS delegations and fixes
oliver-ni Aug 18, 2026
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10 changes: 10 additions & 0 deletions hosts/server/kobudai.nix
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Expand Up @@ -16,6 +16,16 @@
# nfs server should not be mounting nfs from itself
ocf.nfs.enable = lib.mkForce false;

# in linux 6.6, nfsd added write delegations. however, this causes old clients to
# get stuck spamming TEST_STATEID (~5000/s) causing open() to take multiple seconds:
#
# fixed client-side in linux 6.7, but death (and others) are super old (5.10 lol),
# so let's disable delegations for now by disabling vfs leases.
#
# issue: https://gitlab.com/gitlab-org/gitlab-foss/-/work_items/52017
# fix: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a9b8d90f8726
boot.kernel.sysctl."fs.leases-enable" = 0;
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services.nfs.server = {
enable = true;
# https://github.com/ocf/puppet/blob/a081b2210691bd46d585accc8548c985188486a0/modules/ocf_filehost/manifests/init.pp#L10-L16
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