We see this problem too on focal clients with ans without HWE. The server seems to be not affected. Downgrading the clients to 5.15.0-60 or 5.4.0-139 solves the problem here.
Best regards. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2009325 Title: NFS deathlock with last Kernel 5.4.0-144.161 and 5.15.0-67.74 Status in linux package in Ubuntu: Confirmed Bug description: After updating on the kernel 5.4.0-144.161 at Ubuntu 18 and 5.15.0-67.74 at Ubuntu 20, we have a 100% CPU outlation and 20 to 30 Mbit traffic to the clients for our NFS servers. All clients are extremely slow when it comes to access to the NFS resources. Restart and use older kernel, fixed the problem. Ubuntu 18 5.4.0-139-generic Ubuntu 20 5.15.0-60-Generic I don't have a NFS problem with this kernel. Problem came with the last releas on March 3rd, 2023 --- ProblemType: Bug AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Mär 4 15:00 seq crw-rw---- 1 root audio 116, 33 Mär 4 15:00 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.11-0ubuntu27.25 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CasperMD5CheckResult: skip DistroRelease: Ubuntu 20.04 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Error: command ['lsusb'] failed with exit code 1: Lsusb-t: Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1: MachineType: VMware, Inc. VMware Virtual Platform Package: linux (not installed) PciMultimedia: ProcFB: 0 svgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-67-generic root=/dev/mapper/vg1-root ro net.ifnames=0 biosdevname=0 kvm.nx_huge_pages=auto elevator=noop ProcVersionSignature: Ubuntu 5.15.0-67.74~20.04.1-generic 5.15.85 RelatedPackageVersions: linux-restricted-modules-5.15.0-67-generic N/A linux-backports-modules-5.15.0-67-generic N/A linux-firmware 1.187.36 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' Tags: focal Uname: Linux 5.15.0-67-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: True dmi.bios.date: 11/12/2020 dmi.bios.release: 4.6 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: 6.00 dmi.board.name: 440BX Desktop Reference Platform dmi.board.vendor: Intel Corporation dmi.board.version: None dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 1 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.ec.firmware.release: 0.0 dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd11/12/2020:br4.6:efr0.0:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:sku: dmi.product.name: VMware Virtual Platform dmi.product.version: None dmi.sys.vendor: VMware, Inc. --- ProblemType: Bug AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Mär 4 15:03 seq crw-rw---- 1 root audio 116, 33 Mär 4 15:03 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.28 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 18.04 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Error: command ['lsusb'] failed with exit code 1: MachineType: VMware, Inc. VMware Virtual Platform Package: linux (not installed) PciMultimedia: ProcFB: 0 svgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.0.0-43-generic root=/dev/mapper/vg1-root ro net.ifnames=0 biosdevname=0 kvm.nx_huge_pages=auto elevator=noop ProcVersionSignature: Ubuntu 5.0.0-43.47~18.04.1-generic 5.0.21 RelatedPackageVersions: linux-restricted-modules-5.0.0-43-generic N/A linux-backports-modules-5.0.0-43-generic N/A linux-firmware 1.173.21 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' Tags: bionic Uname: Linux 5.0.0-43-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 12/12/2018 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: 6.00 dmi.board.name: 440BX Desktop Reference Platform dmi.board.vendor: Intel Corporation dmi.board.version: None dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 1 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd12/12/2018:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A: dmi.product.name: VMware Virtual Platform dmi.product.version: None dmi.sys.vendor: VMware, Inc. 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