[dundee] Dynamic Kernel Patching problem

[gordon dunlop]

I have been using Ksplice, which is free for Fedora 19 & 20 but not for
Centos/Red Hat systems as it is owned by Oracle. The only reason I am using
it is to have a look at Dynamic Kernel Patching prior to Kpatch being
eventually released for production as this would be great for KVM hosts and
virtual machines where you did not have to reboot everything after a kernel
update.

http://rhelblog.redhat.com/2014/02/26/kpatch/

So far everything has been OK where all the kernel patches has been applied
live until recently when the latest patch would not update.

http://www.securelist.com/en/advisories/59029

Ksplice gave the reason that it could not install the update because one or
more programs are constantly using the kernel functions patched by this
update and gave me the list of the programs running. On the list was
libvirtd, you cannot stop this service if this is being used for the
running of virtual machines (catch 22). It also mentioned mysqld which was
weird as I don't have this running.

$ systemctl status mysqld

gave me output:

mysqld.service - MariaDB database server
   Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled)
   Active: inactive (dead)

It looks like I will just have to download the kernel update and reboot.

Has anyone else been using Ksplice and ran into this problem?

Gordon
www.zubenel.org.uk
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