Hi Du ChengEn, Thanks for your efforts in making this change for this SRU cycle.
However, I can confirm that we too are facing challenges with orders of magnitude (>10x) increases in ACCESS calls, with the newly released kernels. Still better/differently than 5.15.0-67, but not suitable for production. Kernel 5.15.0-69 behaves significantly different than test kernel 5.15.0-67.74+test20230307b2h2cbb6062f8eb. I do not think 5.15.0-67.74+test20230308b0h1a13a615ee3 was ever available from your PPA ?. We ran 5.15.0-67.74+test20230307b2h2cbb6062f8eb for 2 weeks, without issues. What looks like a similar (apache2) environment to Jan and Ben, we have short(er) lived procs with suexec-like setup relying heavily on caching using nocto and increased AC-timeouts options. While I understand the reasoning for avoiding stale access caches, and clearing it in relation to group-member changes, I do not think it was ever the intention to break default long-time behaviour. As of now I cannot confirm issues with increased LOOKUPs in our end as our caches are still warming. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-aws 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: In Progress Status in linux-aws package in Ubuntu: Invalid Status in linux source package in Bionic: Fix Released Status in linux-aws source package in Bionic: Fix Released Status in linux source package in Focal: Fix Released Status in linux-aws source package in Focal: Fix Released Status in linux source package in Jammy: Fix Released Status in linux-aws source package in Jammy: Fix Released Status in linux source package in Kinetic: Fix Released Status in linux-aws source package in Kinetic: Fix Released Status in linux source package in Lunar: In Progress Status in linux-aws source package in Lunar: Invalid 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2009325/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
