Bug#1128861: Acknowledgement (linux: when serving NFS, client attempts to lock served files fail with "No locks available")

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From	Philip Hands <phil@hands.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1128861: Acknowledgement (linux: when serving NFS, client attempts to lock served files fail with "No locks available")
Date	Mon, 23 Feb 2026 23:30:01 +0100
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Cross-posted to 2 groups.

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The /etc/exports entry on the server for the share in question is:

  /var/lib/openqa/share *(fsid=0,rw,no_root_squash,sync,no_subtree_check)

and the /etc/fstab entries on the clients (both of which show the behaviour) are:

  openqa.debian.net:/var/lib/openqa/share /var/lib/openqa/share nfs ro,fsc,soft,bg 0 0

and:

  openqa.debian.net:/var/lib/openqa/share /var/lib/openqa/share nfs nofail,ro,fsc,soft,x-systemd.automount,x-systemd.requires=network-online.target,x-systemd.device-timeout=10s 0 0

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Bug#1128861: linux: when serving NFS, client attempts to lock served files fail with "No locks available" Philip Hands <phil@hands.com> - 2026-02-23 20:40 +0100
  Bug#1128861: Acknowledgement (linux: when serving NFS, client attempts to lock served files fail with "No locks available") Philip Hands <phil@hands.com> - 2026-02-23 23:30 +0100
  Bug#1128861: Acknowledgement (linux: when serving NFS, client attempts to lock served files fail with "No locks available") Philip Hands <phil@hands.com> - 2026-02-24 00:40 +0100
    Bug#1128861: Acknowledgement (linux: when serving NFS, client attempts to lock served files fail with "No locks available") Philip Hands <phil@hands.com> - 2026-02-24 01:30 +0100
  Bug#1128861: Revert 18744bc56b0ec appears to resolve it Tj <tj.iam.tj@proton.me> - 2026-02-24 01:50 +0100
  Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Tj <tj.iam.tj@proton.me> - 2026-02-24 03:20 +0100
    Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Tj <tj.iam.tj@proton.me> - 2026-02-24 14:00 +0100
    Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Thorsten Leemhuis <regressions@leemhuis.info> - 2026-02-27 11:10 +0100
      Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Salvatore Bonaccorso <carnil@debian.org> - 2026-03-04 11:40 +0100
    Bug#1128861: Regression: Missing check in nfsd_permission() causes -ENOLCK No locks available Sasha Levin <sashal@kernel.org> - 2026-03-04 16:50 +0100
  Processed: Re: Bug#1128861: Regression: Missing check in  nfsd_permission() causes -ENOLCK No locks available "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-03-04 11:40 +0100
  Bug#1128861: [PATCH] lockd: fix TEST handling when not all permissions are available. Ben Hutchings <ben@decadent.org.uk> - 2026-03-25 21:40 +0100

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