Userfaultfd error after starting from Rockylinux 8.6 and 8.7

General
#1

Hello,
I recently upgraded/install on both BM server and VMware virtual machine, and found the new version of systemd says at system boot, any one can help investigate this issue? Is it a known issue?

[root@node-10-200-112-178 ~]# grep userfault /var/log/messages
Jan 10 02:11:01 node-10-200-112 systemd-sysctl[369]: Couldn’t write ‘1’ to ‘vm/unprivileged_userfaultfd’, ignoring: No such file or directory
Jan 10 02:11:03 node-10-200-112 systemd-sysctl[876]: Couldn’t write ‘1’ to ‘vm/unprivileged_userfaultfd’, ignoring: No such file or directory
Jan 10 02:26:45 node-10-200-112-178 systemd-sysctl[372]: Couldn’t write ‘1’ to ‘vm/unprivileged_userfaultfd’, ignoring: No such file or directory
Jan 10 02:26:47 node-10-200-112-178 systemd-sysctl[888]: Couldn’t write ‘1’ to ‘vm/unprivileged_userfaultfd’, ignoring: No such file or directory
Jan 11 21:45:31 node-10-200-112-178 systemd-sysctl[368]: Couldn’t write ‘1’ to ‘vm/unprivileged_userfaultfd’, ignoring: No such file or directory
Jan 11 21:45:33 node-10-200-112-178 systemd-sysctl[899]: Couldn’t write ‘1’ to ‘vm/unprivileged_userfaultfd’, ignoring: No such file or directory

BR,
Lei

#2

Maybe thi one is related? 2051329 – systemd-sysctl couldn't write settings to 'vm/unprivileged_userfaultfd'

#3

Thanks. very helpful. I think in 4.18 kernel in Rocky linux 8.x, it is a known issue.