Arch Linux

Taijian

Member

Registered: 2016-04-10

Posts: 74

Spam of 'NFSv4 Callback' threads

I am currently getting my system spammed with thousands of kernel threads, all of them called 'NFSv4 Callback' in htop. Relevant info (I think):

$ uname -a
Linux alien-arch 4.11.0-rc6-mainline #1 SMP PREEMPT Tue Apr 11 00:51:29 CEST 2017 x86_64 GNU/Linux

/etc/fstab (excerpt)
-----------------------------
################# systemd-automount for Rumpelwicht-nfs
Rumpelwicht:/volume1/File-Exchange		/mnt/r-ex	        nfs4	rsize=32768,wsize=32768,users,noauto,x-systemd.automount,x-systemd.device-timeout=5,x-systemd.idle-timeout=1min,x-systemd.requires=network-online.target 0 0
Rumpelwicht:/volume1/homes/gunnar		/mnt/r-home	nfs4	rsize=32768,wsize=32768,users,noauto,x-systemd.automount,x-systemd.device-timeout=5,x-systemd.idle-timeout=1min,x-systemd.requires=network-online.target 0 0
Rumpelwicht:/volume1/Honk-Arch			/mnt/r-harch	nfs4	rsize=32768,wsize=32768,users,noauto,x-systemd.automount,x-systemd.device-timeout=5,x-systemd.idle-timeout=1min,x-systemd.requires=network-online.target 0 0
Rumpelwicht:/volume1/video			        /mnt/r-video	nfs4	rsize=32768,wsize=32768,users,noauto,x-systemd.automount,x-systemd.device-timeout=5,x-systemd.idle-timeout=1min,x-systemd.requires=network-online.target 0 0

$ journalctl -b | grep nfs
Apr 12 15:49:45 alien-arch kernel: Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
Apr 12 15:49:46 alien-arch systemd[1]: var-lib-nfs-rpc_pipefs.mount: Directory /var/lib/nfs/rpc_pipefs to mount over is not empty, mounting anyway.
Apr 12 15:49:50 alien-arch kernel: FS-Cache: Netfs 'nfs' registered for caching
Apr 12 15:51:07 alien-arch nfsidmap[2029]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 19:50:40 alien-arch nfsidmap[4365]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 20:00:48 alien-arch nfsidmap[16360]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 20:10:56 alien-arch nfsidmap[17354]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 20:21:03 alien-arch nfsidmap[18294]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 20:31:11 alien-arch nfsidmap[19266]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 20:41:18 alien-arch nfsidmap[20287]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 20:51:26 alien-arch nfsidmap[21260]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 21:01:34 alien-arch nfsidmap[22230]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 21:11:44 alien-arch nfsidmap[23240]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 21:21:51 alien-arch nfsidmap[24199]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 21:31:58 alien-arch nfsidmap[25397]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 21:42:06 alien-arch nfsidmap[26486]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 21:52:14 alien-arch nfsidmap[27795]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 22:02:21 alien-arch nfsidmap[28918]: nss_getpwnam: name 'admin' not found in domain 'localdomain'
Apr 12 22:11:42 alien-arch nfsidmap[29913]: nss_getpwnam: name 'kodi' not found in domain 'localdomain'
Apr 12 22:11:42 alien-arch nfsidmap[29914]: nss_getpwnam: name 'Judith' not found in domain 'localdomain'
Apr 12 22:13:30 alien-arch nfsidmap[30127]: nss_getpwnam: name 'admin' not found in domain 'localdomain'

Is there anything I can do about that?