DWARF data for 'struct slab' missing in linux-image-3.2.0-* debug deb

[Steven Maresca]

On Wed, Mar 6, 2013 at 4:35 PM, Andy Whitcroft <apw at canonical.com> wrote:

> On Wed, Mar 06, 2013 at 02:26:49PM -0500, Steven Maresca wrote:
> > In the linux-image-3.2.0-* debs from ddebs.ubuntu.com, I've noticed that
> > 'struct slab' seems to be missing from type information provided by DWARF
> > debug data.
> >
> > Very easy to test:
> > # shows the cfs_rq struct definition
> > pahole -C cfs_rq /usr/lib/debug/boot/vmlinux-3.2.0-30-generic
> >
> > # nothing
> > pahole -C slab /usr/lib/debug/boot/vmlinux-3.2.0-30-generic
> >
> > Is that an expected omission?  Another interesting thing to note is that
> > 'struct array_cache' from mm/slab.c is similarly absent. Hundreds of
> other
> > structure types are present as I'd normally expect, so it's an odd thing
> > indeed.  (I've even tried multiple versions of pahole, readelf, objdump,
> > etc. just to be sure).  It's worth saying that, even using SLUB, slab
> > structures should still be in use.
> >
> > I'm at a loss here. Any ideas?
>
> As we use slub by default you would not expect to find things associated
> with that, but with the slub version which uses different data
> structures.
>
> -apw
>
Yes indeed; thanks for setting me straight on IRC.  Apologies for the noise.

Take care,
Steve
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20130306/954fd08c/attachment.html>