There is an endianess problem with /proc/sys/fs/nfs/nsm_use_hostnames (which can e.g. be seen on an s390x host) : # modprobe lockd nsm_use_hostnames=1 # cat /proc/sys/fs/nfs/nsm_use_hostnames 16777216 The nsm_use_hostnames variable is declared as "bool" which is required for the correct type for the module parameter. However, this does not work correctly with the entry in the /proc filesystem since this currently requires "int". Jia He already provided patches for this problem a couple of years ago, but apparently they felt through the cracks and never got merged. So here's a rebased version to finally fix this issue. Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1764075 Jia He (2): sysctl: introduce new proc handler proc_dobool lockd: change the proc_handler for nsm_use_hostnames fs/lockd/svc.c | 2 +- include/linux/sysctl.h | 2 ++ kernel/sysctl.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 45 insertions(+), 1 deletion(-) -- 2.27.0