Both 5.8.0-50 and 5.8.0-25 have the fix of https://bugzilla.kernel.org/show_bug.cgi?id=208807, if -50 doesn't work while -25 works, I guess that the other patches impact this issue.
>From the -25 to -50, there are 7 new patches added to the fs/nfsd/, you could >revert them one by one to test: hwang4@hwang4-ThinkPad-X1-Nano-Gen-1:~/work/mainline/groovy/ubuntu-groovy$ git log --pretty=oneline Ubuntu-5.8.0-25.26..Ubuntu-5.8.0-50.56 fs/nfsd/. a048839aadd1b0a9b7594a47e006161c7b5d1b65 nfsd4: readdirplus shouldn't return parent of export 71f8261ed2ab3d9f89798873c789314def659aa2 NFSD: Fix 5 seconds delay when doing inter server copy 1e2b415540e9a0f47880ed4d10725ab23be9c4f1 nfsd: Fix message level for normal termination 9e5fc966b92ee496bececd6aeaeaf39cc7a48d8d NFSD: fix missing refcount in nfsd4_copy by nfsd4_do_async_copy f5ed4ba307483eb3188efa37a04825c31afdf70e NFSD: Fix use-after-free warning when doing inter-server copy 44c672e9a6cdfff14d9074e4814f1e350cc2a541 NFSD: Add missing NFSv2 .pc_func methods 920960bb5e07ac4e21316ff141fd0e76f6faf2a8 nfsd: rename delegation related tracepoints to make them less confusing ** Bug watch added: Linux Kernel Bug Tracker #208807 https://bugzilla.kernel.org/show_bug.cgi?id=208807 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924829 Title: NFS clients cannot open some files To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924829/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs