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SubjectRe: 2.5.59 NFS server keeps local fs live after being stopped
Neil Brown writes:
> On Wednesday January 29, wrote:
> > Kernel 2.5.59. A local ext2 file system is mounted at $MNTPNT
> > and exported through NFS V3. A client mounts and unmounts it,
> > w/o any I/O in between. The NFS server is shut down. Nothing in
> > user-space refers to $MNTPNT.
> >
> > The bug is that $MNTPNT now can't be unmounted. umount fails with
> > "device is busy". A forced umount at shutdown fails with "device
> > or resource busy" and "illegal seek", and leaves the underlying
> > fs marked dirty.
> >
> > I can't say exactly when this began, but the problem is present
> > in 2.5.59 and 2.5.55. 2.4.21-pre4 does not have this problem.
> How do you shut down the nfs server?

/etc/rc.d/init.d/nfs stop
which basically does a kill on rpc.mountd, nfsd, and rpc.quotad
(standard RH8.0 user-space)

I've checked that all *nfs* processes are gone.

> Is anything in /proc/fs/nfs/export after the shutdown?

Except for the two header lines, it's empty.

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