@mehmetbasaran: This issue is impacting one of the HPC clusters I manage. Are there any thoughts as to when this patch will get rolled out to a released 6.8.0 kernel?
Also, does anyone know if this is a server bug or a client bug, i.e. for mitigation, do the servers need to be rolled back to a version that does not have the bug? Do the clients need to be rolled back? Both? Thanks, Omen -- 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/2062568 Title: nfsd gets unresponsive after some hours of operation Status in linux package in Ubuntu: In Progress Status in nfs-utils package in Ubuntu: Incomplete Status in linux source package in Noble: In Progress Status in nfs-utils source package in Noble: Incomplete Bug description: I installed the 24.04 Beta on two test machines that were running 22.04 without issues before. One of them exports two volumes that are mounted by the other machine, which primarily uses them as a secondary storage for ccache. After being up for a couple of hours (happened twice since yesterday evening) it seems that nfsd on the machine exporting the volumes hangs on something. From dmesg on the server (repeated a few times): [11183.290548] INFO: task nfsd:1419 blocked for more than 1228 seconds. [11183.290558] Not tainted 6.8.0-22-generic #22-Ubuntu [11183.290563] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [11183.290582] task:nfsd state:D stack:0 pid:1419 tgid:1419 ppid:2 flags:0x00004000 [11183.290587] Call Trace: [11183.290602] <TASK> [11183.290606] __schedule+0x27c/0x6b0 [11183.290612] schedule+0x33/0x110 [11183.290615] schedule_timeout+0x157/0x170 [11183.290619] wait_for_completion+0x88/0x150 [11183.290623] __flush_workqueue+0x140/0x3e0 [11183.290629] nfsd4_probe_callback_sync+0x1a/0x30 [nfsd] [11183.290689] nfsd4_destroy_session+0x186/0x260 [nfsd] [11183.290744] nfsd4_proc_compound+0x3af/0x770 [nfsd] [11183.290798] nfsd_dispatch+0xd4/0x220 [nfsd] [11183.290851] svc_process_common+0x44d/0x710 [sunrpc] [11183.290924] ? __pfx_nfsd_dispatch+0x10/0x10 [nfsd] [11183.290976] svc_process+0x132/0x1b0 [sunrpc] [11183.291041] svc_handle_xprt+0x4d3/0x5d0 [sunrpc] [11183.291105] svc_recv+0x18b/0x2e0 [sunrpc] [11183.291168] ? __pfx_nfsd+0x10/0x10 [nfsd] [11183.291220] nfsd+0x8b/0xe0 [nfsd] [11183.291270] kthread+0xef/0x120 [11183.291274] ? __pfx_kthread+0x10/0x10 [11183.291276] ret_from_fork+0x44/0x70 [11183.291279] ? __pfx_kthread+0x10/0x10 [11183.291281] ret_from_fork_asm+0x1b/0x30 [11183.291286] </TASK> From dmesg on the client (repeated a number of times): [ 6596.911785] RPC: Could not send backchannel reply error: -110 [ 6596.972490] RPC: Could not send backchannel reply error: -110 [ 6837.281307] RPC: Could not send backchannel reply error: -110 ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: nfs-kernel-server 1:2.6.4-3ubuntu5 ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1 Uname: Linux 6.8.0-22-generic x86_64 .etc.request-key.d.id_resolver.conf: create id_resolver * * /usr/sbin/nfsidmap -t 600 %k %d ApportVersion: 2.28.1-0ubuntu1 Architecture: amd64 CasperMD5CheckResult: pass Date: Fri Apr 19 14:10:25 2024 InstallationDate: Installed on 2024-04-16 (3 days ago) InstallationMedia: Ubuntu-Server 24.04 LTS "Noble Numbat" - Beta amd64 (20240410.1) NFSMounts: NFSv4Mounts: ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: nfs-utils UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062568/+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
