[CentOS-virt] Xen C6 kernel 4.9.13 and testing 4.9.15 only reboots.

Mark L Sung xlord.sl at gmail.com
Fri Apr 7 04:05:46 UTC 2017


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
>>
>>
>>
>> _______________________________________________
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>> 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
>
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> CentOS-virt at centos.org
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>
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