Please see inline

Brent

From: Lin, Shuicheng [mailto:shuicheng.lin@intel.com]
Sent: Sunday, January 13, 2019 9:28 PM
To: Somerville, Jim <Jim.Somerville@windriver.com>; Little, Scott <Scott.Little@windriver.com>; Wold, Saul <saul.wold@intel.com>; Rowsell, Brent <Brent.Rowsell@windriver.com>; Hu, Yong <yong.hu@intel.com>; Xie, Cindy <cindy.xie@intel.com>
Cc: starlingx-discuss@lists.starlingx.io
Subject: RT kernel upgrade in CentOS 7.6

Hi all,

For CentOS 7.6, the latest source rpm package we have for std and rt kernel are:

Std kernel: kernel-3.10.0-957.1.3.el7.src.rpm

Rt kernel: kernel-rt-3.10.0-957.rt56.910.el7.src.rpm

You could find std kernel is 1 minor version ahead of rt kernel. And there is some discussion about it in patch [0].

There are some question I want to ask, and need your suggestion. Thanks in advance.

1^st question: Is it acceptable to have minor different version for std and rt kernel? If not, why?

[BR] We want to align on a single version as we do not want to deal with two different kernel versions for changes (ex. CVE’s)

2^nd question: If we decide to upgrade rt kernel to the same version as std. There are several way to do it:

a) We generate the src rpm based on code in GIT manually. And save the rpm package to CENGN server. So mirror downloader script could get the new src rpm as previous.

b) We switch to git code instead of src rpm package. We Add the rt kernel git to our manifest file, and download rt kernel code when do “repo sync”.

[BR] I think this is the preferred path.

c) Keep current RT kernel first, and upgrade to new rt kernel when new src rpm is available. I don’t know why it is not available yet. :)

[0]: https://review.openstack.org/625773

Best Regards

Shuicheng