[Unionfs] modprobe error on CentOS 5.2 (RHEL 5.2)

[Erez Zadok]

In message <1233134703.3005.47.camel at zeus.themaw.net>, Ian Kent writes:
> On Tue, 2009-01-27 at 18:34 +0530, Nitin Bhardwaj wrote:

[..]
> > The dmesg output is as follows:
> > 
> > unionfs: Unknown symbol vfs_splice_from
> > unionfs: Unknown symbol krealloc
> > unionfs: Unknown symbol lookup_one_len_nd
> > unionfs: Unknown symbol vfs_splice_to
> > unionfs: Unknown symbol vfs_path_lookup
> 
> It looks like you haven't built the kernel rpms and updated the kernel
> on the machine you want to use the module on.
> 
> I think these are changes to the VFS proper made by the patch. They
> won't be available if you try and install the module on a system with a
> stock kernel.

Ian is correct.  The best way to add such a patch to an RPM is to edit the
rpmspec file and add it there, then rpmbuild the RPM.

Erez.