<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Apr 4, 2017 at 11:13 AM, Johnny Hughes <span dir="ltr"><<a href="mailto:johnny@centos.org" target="_blank">johnny@centos.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-">On 03/28/2017 04:55 PM, PJ Welsh wrote:<br>
</span><span class="gmail-">> The mystery gets more interesting... I now have a CentOS 7.3 Dell R710<br>
> server doing the exact same thing of rebooting immediately after the Xen<br>
> kernel load. Just to note this is a second system and not just the first<br>
> system with an update. I hope I'm not introducing something odd. They<br>
> only "interesting" thing I have done for historical reasons is to change<br>
> the following /etc/sysconfig/grub line:<br>
> GRUB_CMDLINE_XEN_DEFAULT="<wbr>dom0_mem=6G,max:8G cpuinfo com1=115200,8n1<br>
> console=com1,tty loglvl=all guest_loglvl=all"<br>
> But I've done that on other servers without issue. In fact I have a Dell<br>
> R710 that DOES work with CentOS 7 and the new kernel... so confused.<br>
><br>
> On Fri, Mar 24, 2017 at 1:44 PM, Sarah Newman <<a href="mailto:srn@prgmr.com">srn@prgmr.com</a><br>
</span><span class="gmail-">> <mailto:<a href="mailto:srn@prgmr.com">srn@prgmr.com</a>>> wrote:<br>
><br>
> On 03/24/2017 11:35 AM, PJ Welsh wrote:<br>
> > As a follow up I was able to test fresh install on Dell R710 and a Dell<br>
> > R620 with success on CentOS 7.3 without issue on the new kernel. My new<br>
> > plan will be to just move this C6 to one of the C7 I just created.<br>
><br>
> That sounds like a compiler problem, since I think the C6 and C7<br>
> kernels are built from the same source.<br>
><br>
<br>
</span>OK, I have a new CentOS-6 4.9.20-26 kernel here for testing:<br>
<br>
<a href="https://people.centos.org/hughesjr/4.9.16/6/x86_64/" rel="noreferrer" target="_blank">https://people.centos.org/<wbr>hughesjr/4.9.16/6/x86_64/</a><br>
<br>
I am building the el7 one right now as well, it will be at:<br>
<br>
<a href="https://people.centos.org/hughesjr/4.9.16/7/x86_64/" rel="noreferrer" target="_blank">https://people.centos.org/<wbr>hughesjr/4.9.16/7/x86_64/</a><br>
<br>
George and I found some issues with the 4.9.x config files for the xen<br>
kernel. Hopefully this one is much more stable as it has many changes<br>
from the fedora/rhel type configs now (what is built into the kernel,<br>
what is loaded as a kernel module, etc.)<br>
<br>
Please test these kernels so we can get them released.<br>
<br>
Thanks,<br>
Johnny Hughes<br>
<br>
<br>
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<br></blockquote></div><br></div><div class="gmail_extra">CentOS-6 4.9.20-26 kernel exhibits the same constant kernel-start-then-reboot issue when booting under the "CentOS Linux, with Xen hypervisor" grub2 menu option. However, it *does* properly boot under the "CentOS Linux (4.9.20-25.el7.x86_64) 7 (Core)" grub2 menu option!<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">A semi-close look at the /etc/grub2.cfg yields no discernible difference between a properly functional Dell R620 and the non-properly functioning Dell R710.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Sorry, I had been distracted with other issues and have not yet submitted information to the xen-devel group yet.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Thanks</div><div class="gmail_extra">PJ</div></div>