kernel 2.6: NFS problem---cannot rmmod nfsd

kernel 2.6: NFS problem---cannot rmmod nfsd

[Xin Zhao]

I compile kernel 2.6.11.10 and configure both nfs client and server as
kernel modules.  But after I reboot the machine and did
"/etc/init.d/nfs start", the nfsd module is inserted. But when I tried
to rmmod this module either with "/etc/init.d/nfs stop" or "umount
/proc/fs/nfsd; rmmod nfsd",  the nfsd reference count is always 1 and
cannot be removed.  Why?

Thanks in advance for your kind help!

-x

Re: kernel 2.6: NFS problem---cannot rmmod nfsd

[Xin Zhao]

Please discard the previous message.

I just noticed that something was wrong in the nfsd implementation
(slightly modified by me). After I fixed the problem, I can rmmod nfsd
now.

Sorry for the confusion.

-x

On 7/5/05, Xin Zhao <uszhaoxin@gmail.com> wrote:
> I compile kernel 2.6.11.10 and configure both nfs client and server as
> kernel modules.  But after I reboot the machine and did
> "/etc/init.d/nfs start", the nfsd module is inserted. But when I tried
> to rmmod this module either with "/etc/init.d/nfs stop" or "umount
> /proc/fs/nfsd; rmmod nfsd",  the nfsd reference count is always 1 and
> cannot be removed.  Why?
> 
> Thanks in advance for your kind help!
> 
> -x
>

Re: kernel 2.6: NFS problem---cannot rmmod nfsd

[Steve Dickson]

Xin Zhao wrote:
> I compile kernel 2.6.11.10 and configure both nfs client and server as
> kernel modules.  But after I reboot the machine and did
> "/etc/init.d/nfs start", the nfsd module is inserted. But when I tried
> to rmmod this module either with "/etc/init.d/nfs stop" or "umount
> /proc/fs/nfsd; rmmod nfsd",  the nfsd reference count is always 1 and
> cannot be removed.  Why?
Because you need to umount /proc/fs/nfsd.
Note: you'll also need to restart rpc.idmapd.

Try the following:

service nfs start # which load everything that's needed

service nfs stop
service rpcidmapd stop
umount /proc/fs/nfsd
rmmod nfsd

Then to (safely) reinstall the module

insmod /tmp/nfsd.ko
mount -t nfsd nfsd /proc/fs/nfsd
service nfs start (which also will start rpcidmapd on FC boxes)

steved.