On 11/09/2009, Akemi Yagi <amyagi at gmail.com> wrote: > On Fri, Sep 11, 2009 at 4:46 AM, Johnny Hughes <johnny at centos.org> wrote: > > > Also, there is NO conflict or problem having both modules installed. > > True (as I mentioned in my earlier post). But see below... > > > Also, ALSO :D, I published an article on how to upgrade DRBD here: > > > > http://centosnow.blogspot.com/2009/08/drbd-packages-in-centos-4-and-centos-5.html > > This is a must-read. You should advertise it in more places. :-D > > > So, I do not agree that kmod needs to obsolete the older one. I think > > that having the older kmod there in case you need to boot into the older > > kernel is not bad. > > That is the statement I have difficulty understanding. :) In case you > need to boot into the older kernel ... the drbd module from -83 should > be there as a symlink. Or, if you mean boot into the older kernel to > get drbd.ko *82*, then you would have to reinstall drbd82. > > In other words, if drbd83 obsoletes drbd82, there is no merit for > still having drbd.ko (82) around because drbd82 gets removed upon the > 82 -> 83 upgrade. If someone needs to go back to the 82, he needs to > manually install drbd82 anyway. (hope I'm making sense here) :-) > > One (minor) drawback of keeping both kmods is that each time > /sbin/meak-module is run, it has to do extra work going through all > installed kernels, once for kmod-drbd82 and another time for > kmod-drbd83. > > Akemi > - now completely hiding under a huge rock A question in two parts -- for Akemi to consider: Are the kmod-drbd* packages kABI tracking? Or are they kernel version dependant? Alan.