kernel-2.6.3-1.97 x root on LVM (with solution)

[Alexandre Oliva]

After upgrading to kernel-2.6.3-1.97, it seems that device mapper
devices in the read-only root filesystem no longer worked: after the
kernel upgrade, fsck failed because the logical volume device name (a
link to the device-mapper device) no longer referenced the right
device.  I had to mount -o remount,rw /, then remove all the
LVM2-created device names in /dev/mapper, and then run lvm vgmknodes.
Everything worked fine from then on.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Happy GNU Year!                     oliva@{lsd.ic.unicamp.br, gnu.org}
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
Free Software Evangelist                Professional serial bug killer