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kernel update/reboot best practice question

Dear All,

Quite some time ago I have noticed that kernel updated quite often "come
in pairs". That is, if there was no kernel update for quite some time,
and, say, today kernel update for some system level (say, CentOS 6) was
released, then it is quite likely that there will be yet one more kernel
update for the same system level 3-5 days later. As if the kernel is first
patched quick and dirty, then more careful and comprehensive work is done.
Not that I would disagree with this practice, to the contrary, from some
prospective it makes a lot of sense to me.

I wonder what best practices everybody follows: do you tolerate two
reboots separated by few days, or you wait till final kernel update comes,
and reboot only once then?

Thanks a lot for your insights!

Valeri

++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
++++++++++++++++++++++++++++++++++++++++

Comments

Re: kernel update/reboot best practice question

By Gordon Messmer at 02/27/2017 - 12:44

On 02/27/2017 08:21 AM, Valeri Galtsev wrote:

Looking at the errata list for the kernel package on RHEL 6, I don't see
any such pattern. It's certainly happened that kernel updates are
released withing a couple of days of each other, but not regularly.

<a href="https://rhn.redhat.com/errata/rhel-server-6-errata.html" title="https://rhn.redhat.com/errata/rhel-server-6-errata.html">https://rhn.redhat.com/errata/rhel-server-6-errata.html</a>

Re: kernel update/reboot best practice question

By Valeri Galtsev at 02/27/2017 - 13:01

On Mon, February 27, 2017 10:44 am, Gordon Messmer wrote:
I see. It must be pure psychology that makes me notice the events of two
kernel updates within a few days of each other more than events of single
kernel update. This answers my question about best practice: just do
kernel update as soon as it is released, and reboot (and bite the bullet
if another kernel update comes ;-)

Thanks a lot!

Valeri

++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
++++++++++++++++++++++++++++++++++++++++