[CentOS-devel] no drbd after update to 5.3

Akemi Yagi amyagi at gmail.com
Tue Apr 14 14:35:51 UTC 2009

On Tue, Apr 14, 2009 at 6:20 AM, Jerry Amundson <jamundso at gmail.com> wrote:
> On Mon, Apr 13, 2009 at 5:08 PM, Akemi Yagi <amyagi at gmail.com> wrote:

>> I suppose, at some point in time, you had
>> kmod-drbd-xen-8.0.12- which installed
>> /lib/modules/2.6.18-92.1.6.el5xen/extra/drbd82/drbd.ko. [expected
>> behavior]
>> When kmod-drbd82-xen-8.2.6-2 was installed later on, it installed
>> /lib/modules/2.6.18-92.1.13.el5xen/extra/drbd82/drbd.ko and created
>> symlinks through the action of /sbin/weak-modules.  Kernels that
>> existed at that moment now point to the drbd.ko in
>> /lib/modules/2.6.18-92.1.13.el5xen. [expected behavior]
> Yes, I'm with you so far.
>> When the kernel was updated to -128 (upon 5.3 update), weak-modules
>> was supposed to do the same (create a symlink to
>> 2.6.18-92.1.13.el5xen).  But instead, it made a link to
>> 2.6.18-92.1.6.el5xen.  This is the part I don't understand. [???]
> It seems related to installation order. With the kernel not yet
> installed, weak-modules has nothing to pick up in /lib/modules for the
> new kernel...
> [root at xenb ~]# rpm -qa --last | grep xen
> xen-3.0.3-80.el5_3.2                          Mon 13 Apr 2009 01:58:11 PM CDT
> kernel-xen-2.6.18-128.1.6.el5                 Mon 13 Apr 2009 01:57:51 PM CDT
> xen-libs-3.0.3-80.el5_3.2                     Mon 13 Apr 2009 01:57:26 PM CDT
> kmod-drbd82-xen-8.2.6-2                       Thu 19 Mar 2009 02:41:55 PM CDT
> kernel-xen-2.6.18-92.1.22.el5                 Thu 19 Mar 2009 02:41:39 PM CDT
> kmod-drbd82-xen-8.2.6-    Fri 15 Aug 2008 03:19:31 PM CDT
> kernel-xen-2.6.18-92.1.10.el5                 Fri 15 Aug 2008 03:19:09 PM CDT

Yes, that is the normal order.  /sbin/weak-module is run during the
kernel installation as you can see in the script (some messages ago).
It surveys installed modules (not kernel built-in) and sets up
symlinks for those that are kABI compatible.

When kernel-xen-2.6.18-128.1.6 was installed on your system, it was
supposed to make a link to the drbd.ko in
/lib/modules/2.6.18-92.1.13.el5xen which already existed at that time.
 But it didn't.  Very strange.


More information about the CentOS-devel mailing list