The "sudo lsmod|egrep procfs3" shows -1 on the "used by" column

[tclee060219sat]

Shown below is the procfs3 insmod/lsmod/rmmod scenario. I am figuring out why -1 is on its 3rd column. Comment please. FYI, the same command sequence for procfs1.ko and procfs2.ko succeeded.

lkmpg/examples$ ls -lrt procfs3.*
-rw-rw-r-- 1 tclee tclee     98  3月 27 14:37 procfs3.mod
-rw-rw-r-- 1 tclee tclee     98  3月 27 14:37 procfs3.mod
-rw-rw-r-- 1 tclee tclee   3445  3月 30 14:54 procfs3.c.mar30thu23.0254pm
-rw-rw-r-- 1 tclee tclee   1253  3月 30 15:24 procfs3.mod.c
-rw-rw-r-- 1 tclee tclee  50200  3月 30 15:24 procfs3.mod.o
-rw-rw-r-- 1 tclee tclee   3021  3月 30 15:34 procfs3.c
-rw-rw-r-- 1 tclee tclee 166288  3月 30 15:34 procfs3.o
-rw-rw-r-- 1 tclee tclee 214984  3月 30 15:34 procfs3.ko
lkmpg/examples$ sudo lsmod|egrep procfs
procfs3                16384  -1
lkmpg/examples$ sudo rmmod procfs3
lkmpg/examples$ sudo lsmod|egrep procfs
procfs3                16384  -1

[jserv]

@tclee060219sat, I annotated your message for better illustration. Please do that always.

[linD026]

Not sure what is happening on your side, although it might be related to the try_module_get [1].
I don't have this problem with 5.4.0-80-generic kernel:

ubuntu@ubuntu:~/lkmpg/examples$ sudo insmod procfs3.ko
ubuntu@ubuntu:~/lkmpg/examples$ sudo lsmod|egrep procfs3
procfs3                20480  0
ubuntu@ubuntu:~/lkmpg/examples$ sudo rmmod procfs3 
ubuntu@ubuntu:~/lkmpg/examples$ sudo lsmod|egrep procfs3
ubuntu@ubuntu:~/lkmpg/examples$ 

Could you please provide more information?

[tclee060219sat]

lkmpg/examples$ sudo lsmod|egrep procfs3 procfs3 20480 0 lkmpg/examples$ sudo rmmod procfs3&&sudo lsmod|egrep procfs3 lkmpg/examples$ sudo lsmod|egrep procfs3 Shown above is the result of my lsmod/insmod/rmmod execution this morning, after my 5.19.0-35-generic laptop was rebooted. It differs from the one I encountered yesterday. I believe this issue has been resolved.