[Unionfs] corruption of rpm database with unionfs (and ldconfig)

[Erez Zadok]

In message <m3fxu1tvwa.fsf at dynamo.mandriva.com>, Olivier Blin writes:
> Erez Zadok <ezk at cs.sunysb.edu> writes:
> 
> > In message <m3prulos1m.fsf at dynamo.mandriva.com>, Olivier Blin writes:
> >> --=-=-=
> >> 
> >> Hello,
> >> 
> >> We have a weird rpm database corruption in Mandriva live systems with
> >> current unionfs (2.2.4).
> >> Databases files from /var/lib/rpm get corrupted with no obvious
> >> reason after running ldconfig (at first look, it does not look
> >> related to the ldconfig thread on this ML).
> >
> > Olivier, can you please retry with unionfs-2.3 and let me know if it
> > improves the situation?  If not, can you send me a URL to a new iso image to
> > test this on?  (I don't care how large the image is.)
> 
> Hello Erez,
> 
> I can't reproduce the bug with unionfs 2.3.1, thanks a lot for the fix!
> Any idea about which patch fixed the problem? Was it a mmap issue?
> 
> If you still need a reproducible testcase, you can try with this
> updated image:
> http://distrib-coffee.ipsl.jussieu.fr/pub/linux/MandrivaLinux/devel/iso/2008.1/rc2/mandriva-linux-2008-spring-rc2-one-KDE-int-cdrom-i586.iso
> 
> Thanks again
> 
> -- 
> Olivier Blin (blino) - Mandriva

Good to know, Olivier.  I suspect the address_space_ops/vm_operations
overhaul fixed this.

Erez.