[Discussion] Re: drbd 8.0.2/3 doesn't load under kernel 2.6.21

[Maurice Volaski <mvolaski@xxxxxxxxxxxx>]

First, did you confirm this behavior? Can you please explain that? 
How could they possibly interact with one another?


> On Wed, Aug 01, 2007 at 04:21:29PM -0400, Maurice Volaski wrote:
> >  I'm making an assumption that depmod is somehow to blame and have logged
> >  this as a kernel bug, http://bugzilla.kernel.org/show_bug.cgi?id=8829
>
> depmod is working fine.
>
> It's the interaction between your two patches that breaks it for you.
>
> > > >  It turns out I was adding the web100 patch (http://www.web100.org) to
> > > >  the 2.6.21 kernel and that's what causes the symbol resolving problem
> > > >  below. Adding the corresponding version of the web100 patch to the
> > > >  2.6.20 kernel makes this problem appear there as well. On fresh
> > > >  versions of the kernel, this problem does not occur. At the moment,
> > > >  it's not possible to have a current kernel that contains both drbd
> > > >  and web100.
> > > >
> > > > >  On a 64-bit Gentoo system with Gentoo's 2.6.21 kernel, drbd 8.0.2/3
> > > > >  complains when I try to load the module:
> > > > >
> > > > >  [  134.141363] drbd: Unknown symbol cn_fini
> > > > >  [  134.141399] drbd: Unknown symbol cn_init
> > > > >
> > > > >  It works fine when I compile it and load in the previous kernel
> > > > >  version, 2.6.20 and the symbols are present in the map file
> > > > >
> > > > >  ./System.map-genkernel-x86_64-2.6.21-gentoo-r2:ffffffff802935aa t
> > > > >  cn_fini
> > > > >  ./System.map-genkernel-x86_64-2.6.21-gentoo-r2:ffffffff8029362a t
> > > > >  cn_init
> > > > >
> > > > >  I am c'cing the kernel mailing list because this appears to be a
> > > > >  problem with how any module accesses symbols in the kernel, not just
> > > >   >drbd. Source was compiled with Gentoo gcc-4.1.2, glibc-2.5-r3
>
> cu
> Adrian

--

Maurice Volaski, mvolaski@xxxxxxxxxxxx
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University

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