On Thu, Sep 19, 2019 at 9:00 AM James Harvey <jamespharvey20@xxxxxxxxx> wrote: > > For a really long time (years?) if you forced NFS v4 only, you could > mask a lot of unnecessary services. > > In /etc/nfs.conf, in "[nfsd] I've been able to set "vers3=n", and then > mask the following services: > * gssproxy > * nfs-blkmap > * rpc-statd > * rpcbind (service & socket) > > Upgrading from 5.2.14 to 5.3.0, nfs-server.service (rpc.nfsd) has > exactly a 5 minute delay, and sometimes longer. > > ... P.S. During a few of the earlier boots where I was seeing strace show the delay was reading "/proc/fs/nfsd/versions", I do have this in journalctl, when I tried in another term cat'ing it during the rpc.nfsd delay: (it repeats a few times during the 5 minute delay) INFO: task cat:3400 blocked for more than 122 seconds. Not tainted 5.3.0-arch1-1-ARCH #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. cat D 0 3400 3029 0x00000080 Call Trace: ? __schedule+0x27f/0x6d0 schedule+0x43/0xd0 schedule_preempt_disabled+0x14/0x20 __mutex_lock.isra.0+0x27d/0x530 write_versions+0x38/0x3c0 [nfsd] ? _copy_from_user+0x37/0x60 ? write_ports+0x320/0x320 [nfsd] nfsctl_transaction_write+0x45/0x70 [nfsd] nfsctl_transaction_read+0x3b/0x60 [nfsd] vfs_read+0x9d/0x150 ksys_read+0x67/0xe0 do_syscall_64+0x5f/0x1c0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f47286fa155 Code: Bad RIP value. RSP: 002b:00007ffcd2a74438 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00007f47286fa155 RDX: 0000000000020000 RSI: 00007f47282ba000 RDI: 0000000000000003 RBP: 00007f47282ba000 R08: 00007f47282b9010 R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000246 R12: 00007f47282ba000 R13: 0000000000000003 R14: 0000000000000fff R15: 0000000000020000 svc: failed to register lockdv1 RPC service (errno 110). lockd_up: makesock failed, error=-110