So interesting and challenging too, IT seems to Xen compatibility to Dell board BIOS related. I have Dell R710 and R7200 with same Xen version, but the outcome is completely different, that R720 is slow in performance and reboot too. xlord On Apr 5, 2017 23:42, "PJ Welsh" <pjwelsh at gmail.com> wrote: > On Tue, Apr 4, 2017 at 11:13 AM, Johnny Hughes <johnny at centos.org> wrote: > >> On 03/28/2017 04:55 PM, PJ Welsh wrote: >> > The mystery gets more interesting... I now have a CentOS 7.3 Dell R710 >> > server doing the exact same thing of rebooting immediately after the Xen >> > kernel load. Just to note this is a second system and not just the first >> > system with an update. I hope I'm not introducing something odd. They >> > only "interesting" thing I have done for historical reasons is to change >> > the following /etc/sysconfig/grub line: >> > GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=6G,max:8G cpuinfo com1=115200,8n1 >> > console=com1,tty loglvl=all guest_loglvl=all" >> > But I've done that on other servers without issue. In fact I have a Dell >> > R710 that DOES work with CentOS 7 and the new kernel... so confused. >> > >> > On Fri, Mar 24, 2017 at 1:44 PM, Sarah Newman <srn at prgmr.com >> > <mailto:srn at prgmr.com>> wrote: >> > >> > On 03/24/2017 11:35 AM, PJ Welsh wrote: >> > > As a follow up I was able to test fresh install on Dell R710 and >> a Dell >> > > R620 with success on CentOS 7.3 without issue on the new kernel. >> My new >> > > plan will be to just move this C6 to one of the C7 I just created. >> > >> > That sounds like a compiler problem, since I think the C6 and C7 >> > kernels are built from the same source. >> > >> >> OK, I have a new CentOS-6 4.9.20-26 kernel here for testing: >> >> https://people.centos.org/hughesjr/4.9.16/6/x86_64/ >> >> I am building the el7 one right now as well, it will be at: >> >> https://people.centos.org/hughesjr/4.9.16/7/x86_64/ >> >> George and I found some issues with the 4.9.x config files for the xen >> kernel. Hopefully this one is much more stable as it has many changes >> from the fedora/rhel type configs now (what is built into the kernel, >> what is loaded as a kernel module, etc.) >> >> Please test these kernels so we can get them released. >> >> Thanks, >> Johnny Hughes >> >> >> >> _______________________________________________ >> CentOS-virt mailing list >> CentOS-virt at centos.org >> https://lists.centos.org/mailman/listinfo/centos-virt >> >> > 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! > > 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. > > Sorry, I had been distracted with other issues and have not yet submitted > information to the xen-devel group yet. > > Thanks > PJ > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20170407/8d5e9491/attachment-0005.html>