To: CentOS mailing list centos@centos.org

Thema: Re: [CentOS] Nvidia maximum pixel clock issue in

kmod-nvidia-384.98

Dear All,

Start BIOS Configuration and go to Graphic Configuration change On Board VGA to PCI Express x16

Automatic is VGA on Board

Bis bald

Alexander

Am 09.01.2018 um 13:00 schrieb centos-request@centos.org:

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Today's Topics:

1. Re: CentOS 7.4 fails to boot as Xen PV guest: resurfaces (now
   also) with centosplus kernel 693.11.6.el7 (Johnny Hughes)
2. Re: Nvidia maximum pixel clock issue in kmod-nvidia-384.98
   (Phil Perry)
3. C6 KPTI cpuinfo flag? (Robert Arkiletian)
4. Re: C6 KPTI cpuinfo flag? (isdtor)
5. Cent OS 7.3 Shared library issue (Aman Sharma)

---

Message: 1 Date: Mon, 8 Jan 2018 06:46:31 -0600 From: Johnny Hughes johnny@centos.org To: centos@centos.org Subject: Re: [CentOS] CentOS 7.4 fails to boot as Xen PV guest: resurfaces (now also) with centosplus kernel 693.11.6.el7 Message-ID: dda9a351-3260-647c-b4f0-5c00f6b3bfd5@centos.org Content-Type: text/plain; charset="utf-8"

On 01/08/2018 12:38 AM, Akemi Yagi wrote:

...

On Sun, Jan 7, 2018 at 12:07 PM, David Groep davidg@nikhef.nl wrote:

...

Dear all,

Maybe I'm the only one - so before filing it as a bug: it appears that the latest set of kernel patches in 3.10.0-693.11.6.el7 makes issue 0013763 "CentOS 7.4 kernel (3.10.0-693*) fails to boot as Xen PV guest" re-surface *also* with the CentOS PLUS kernel. But maybe in a different way ...

Thanks to the (great!) quick work on making the plus kernel available (in #14330, thanks for that!) I was able to test the following combinations:

• 3.10.0-693.11.6.el7.centos.plus works fine on XenServer 7 HVM guests
• 3.10.0-693.11.1.el7.centos.plus works fine on XenServer 7 XenPV guests
• 3.10.0-693.11.6.el7.centos.plus crashes on boot for XS7 XenPV guests immediately after the boot stage where the PS/2 drivers are loaded

Crashing does not depend on the amount of VM memory or #cores/sockets. Also, the tell-tale "mm/vmalloc.c" failure output is no longer present. The system 'just' crashes (with the kernel log lines as below) around the time of the i8042 controller probing.

Obviously the stock upstream 3.10.0-693.11.6.el7 crashes as well for XS7 XenPV guests, but that was to be expected as per 0013763. It crashes in the same way, around the time of the i8042 probes.

Can anyone (maybe bill_mcgonigle?) reproduce the issue? Did the KPTI patches break the XenPV fixes in CentOS Plus per 13763? Or is this a new XenPV issue?

?You may want to be watching the centos-virt mailing list. Xen-related issues are discussed there.

This thread:

? https://lists.centos.org/pipermail/centos-virt/2018-January/005716.html

?has a response from Johnny Hughes with a possible solution.

And specifically, this message has links to the 4.9.75 x86_64 kernel that will boot and run as a Xen PV kernel:

https://lists.centos.org/pipermail/centos-virt/2018-January/005721.html

Also, the latest Xen Dom0 kernel 4.9.75 kernel will also boot a DomU Xen PV. That kernel is still in testing, and also requires the latest linux-firmware rpms:

https://buildlogs.centos.org/centos/7/virt/x86_64/

or

https://buildlogs.centos.org/centos/6/virt/x86_64/

(And your xen version ... xen-44/, xen-46/, xen-48/)

Those kernels should be signed released to the main Xen repo sometime this week.

And as someone has mentioned in another thread (Phil Perry), please read Greg K-H's (the Kernel.org LTS maintainer, he is in charge of the 4.9.x LTS tree that we use for the above kernels):

http://www.kroah.com/log/blog/2018/01/06/meltdown-status/

Thanks, Johnny Hughes