<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle20
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle21
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1870952262;
mso-list-type:hybrid;
mso-list-template-ids:832725396 67698711 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-number-format:alpha-lower;
mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal"><span style="color:#1F497D">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">I just find 957.1 rt kernel is the 3<sup>rd</sup> party repo now.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">So I will upgrade the rt kernel to 957.1, the same as std kernel.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Here is the link:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><a href="http://linuxsoft.cern.ch/cern/centos/7.6/rt/Sources/SPackages/kernel-rt-3.10.0-957.1.3.rt56.913.el7.src.rpm">http://linuxsoft.cern.ch/cern/centos/7.6/rt/Sources/SPackages/kernel-rt-3.10.0-957.1.3.rt56.913.el7.src.rpm</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Next time, when we have different version for std and rt kernel, I will try to follow 2.b method.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="color:#1F497D">Best Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Shuicheng<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Rowsell, Brent [mailto:Brent.Rowsell@windriver.com]
<br>
<b>Sent:</b> Monday, January 14, 2019 10:53 AM<br>
<b>To:</b> Lin, Shuicheng <shuicheng.lin@intel.com>; Somerville, Jim <Jim.Somerville@windriver.com>; Little, Scott <Scott.Little@windriver.com>; Wold, Saul <saul.wold@intel.com>; Hu, Yong <yong.hu@intel.com>; Xie, Cindy <cindy.xie@intel.com><br>
<b>Cc:</b> starlingx-discuss@lists.starlingx.io<br>
<b>Subject:</b> RE: RT kernel upgrade in CentOS 7.6<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Please see inline<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Brent <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> Lin, Shuicheng [<a href="mailto:shuicheng.lin@intel.com">mailto:shuicheng.lin@intel.com</a>]
<br>
<b>Sent:</b> Sunday, January 13, 2019 9:28 PM<br>
<b>To:</b> Somerville, Jim <<a href="mailto:Jim.Somerville@windriver.com">Jim.Somerville@windriver.com</a>>; Little, Scott <<a href="mailto:Scott.Little@windriver.com">Scott.Little@windriver.com</a>>; Wold, Saul <<a href="mailto:saul.wold@intel.com">saul.wold@intel.com</a>>;
Rowsell, Brent <<a href="mailto:Brent.Rowsell@windriver.com">Brent.Rowsell@windriver.com</a>>; Hu, Yong <<a href="mailto:yong.hu@intel.com">yong.hu@intel.com</a>>; Xie, Cindy <<a href="mailto:cindy.xie@intel.com">cindy.xie@intel.com</a>><br>
<b>Cc:</b> <a href="mailto:starlingx-discuss@lists.starlingx.io">starlingx-discuss@lists.starlingx.io</a><br>
<b>Subject:</b> RT kernel upgrade in CentOS 7.6<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal">For CentOS 7.6, the latest source rpm package we have for std and rt kernel are:<o:p></o:p></p>
<p class="MsoNormal">Std kernel: kernel-3.10.0-957.1.3.el7.src.rpm<o:p></o:p></p>
<p class="MsoNormal">Rt kernel: kernel-rt-3.10.0-957.rt56.910.el7.src.rpm<o:p></o:p></p>
<p class="MsoNormal">You could find std kernel is 1 minor version ahead of rt kernel. And there is some discussion about it in patch [0].<o:p></o:p></p>
<p class="MsoNormal">There are some question I want to ask, and need your suggestion. Thanks in advance.<span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">1<sup>st</sup> question: Is it acceptable to have minor different version for std and rt kernel? If not, why?<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">[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)<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><o:p> </o:p></p>
<p class="MsoNormal">2<sup>nd</sup> question: If we decide to upgrade rt kernel to the same version as std. There are several way to do it:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">a)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>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.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">b)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>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”.
<o:p></o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">[BR] I think this is the preferred path.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">c)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>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. :)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">[0]: <a href="https://review.openstack.org/625773">https://review.openstack.org/625773</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best Regards<o:p></o:p></p>
<p class="MsoNormal">Shuicheng<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>