Bug#302523: kernel-image-2.6.11-9-amd64-k8: module dm_mod locks my IDE disks

[Laurent.Bonnaud@inpg.fr]

Package: kernel
Version: 2.6.11-1
Severity: normal


Hi,

this system boots from a RAID1 array made of 2 SATA disks.  It then
tries to mount 2 PATA disks.  Unfortunately mount refuses to mount
those disks because they are "busy".  The "dm_mod" module is
responsible for locking those disks.  It is loaded automatically on
boot (BTW, do you know who is responsible for this ?).  Removing this
module does not even work:

# rmmod dm_mod
ERROR: Module dm_mod is in use

I can still work-around this bug by using the "-f" option:

# rmmod -f dm_mod

Then I can mount my disks.

The same problem also existed in previous kernels I tried (2.6.8 and
2.6.10).

To sum this up there are in fact 3 bugs:

 1. dm_mod is loaded even if I did not requested it (I would not care
    if it did nothing)
 2. dm_mod locks my disks
 3. dm_mod cannot be removed simply


-- System Information:
Debian Release: 3.1
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.11-9-amd64-k8
Locale: LANG=fr_FR@euro, LC_CTYPE=fr_FR@euro (charmap=ISO-8859-15)

Versions of packages kernel-image-2.6.11-9-amd64-k8 depends on:
ii  coreutils [fileutils]         5.2.1-2    The GNU core utilities
ii  e2fsprogs                     1.37-1     ext2 file system utilities and lib
ii  initrd-tools                  0.1.77     tools to create initrd image for p
ii  module-init-tools             3.2-pre1-2 tools for managing Linux kernel mo

-- no debconf information