Re: [CentOS-virt] LZ4 Kernel Decompression not supported

On 10/12/20 3:24 AM, Dr Francis Greaves wrote: I am running XEN on CentOS Linux release 7.8.2003 I have a Debian 7, and two Gentoo DomU Guests running fine. I am trying to get an Ubuntu 20.04 DomU Guest running but I get this error when trying to run the netboot kernel image

Re: [CentOS-virt] CentOS 8 Install as DOMU in PV Environment

On 9/27/20 1:23 PM, 9f9dcad3f78905b03201--- via CentOS-virt wrote: Christoph, I understand this is the better option if HVM is available.. Im not sure how to make use of this kernel in a non-HVM, PV environment. I'm a little disturbed by the fact that there isnt PV support in CentOS 8, I hope

Re: [CentOS-virt] xen hvm domU and > 3 nic's... bug?

On 2/27/20 5:12 AM, Christoph wrote: It seems to be a problem with kernel... I use the kernel-ml there (5.5.6)... with kernel from centos-virt repo (4.9.*) it works without this problem... Have you made some pass to look for related problems on the xen-users or xen-devel mailing list or in the

Re: [CentOS-virt] centos-virt CPU microcode updates?

On 5/16/19 2:12 AM, Karel Hendrych wrote: > Hi, > > is there any guide for CPU microcode updates on CentOS6, Xen 4.10, kernel 4.9 > ? I'm not sure off the top of my head. You can add ucode=scan to the xen command line, add a file /path/to/microcode_file as the last item in your boot list, and

Re: [CentOS-virt] Xen-kernel: Update to 4.14 or 4.19?

On 3/7/19 10:30 AM, Akemi Yagi wrote: > On Thu, Mar 7, 2019 at 9:42 AM George Dunlap wrote: >> >> Hey all, >> >> We've been on 4.9 for some time now, and while it's still supported, I >> think it's time to start thinking about upgrading, and I'd like input >> from the community about which

Re: [CentOS-virt] how to update ucode with xen

On 09/18/2018 11:55 PM, Christoph wrote: > > Hi > > can someone say me how to update the µcode of the cpu with xen? > > I have added the ucode=scan parameter to xen but it does not seem to work... > > the µcode version of my xeon is really old :/ > > model name    : Intel(R) Xeon(R) CPU

Re: [CentOS-virt] ANNOUNCE: centos-release-xen switching to 4.8 next week

On 08/02/2018 03:58 AM, T.Weyergraf wrote: > Hi > > Thanks for providing updated Packages, they are much appreciated. At work, we > are currently running an entire production infrastructure on Xen4CentOS, > with quite some success. > > We are looking into a refresh towards CentOS 7 along with

Re: [CentOS-virt] custom Xen on custom kernel on CentOS 7

On 02/27/2018 07:50 AM, John Vetter wrote: > Hi, > I'm trying to run an arbitrary Xen version (4.7.x) on a recent kernel (say, > 4.13.x) on CentOS 7. > What is the recommended way for doing this? (I am new to Xen and > virtualization). > I tried the following: > 1. installed xen4centos. > 2.

Re: [CentOS-virt] Xen 4.4 Immediate EOL

On 01/18/2018 09:56 AM, Kevin Stange wrote: > Apparently I failed to do proper due diligence before making this > recommendation. The Xen 4.4 repo does not have vixen build because of a > dependency upon grub2 which isn't available under CentOS 6. Your best > bet would be to use Vixen for PV

Re: [CentOS-virt] Centos 6 2.6.32-696.18.7.el6.x86_64 does not boot in Xen PV mode

On 01/05/2018 05:26 PM, Shaun Reitan wrote: > I can confirm the issue with 2.6.32-696.18.7.el6.x86_64, but mine looks > alittle different... Maybe because i'm using pvgrub. > > = Init TPM Front > Tpmfront:Error Unable to read device/vtpm/0/backend-id during tpmfront

[CentOS-virt] Centos 6 2.6.32-696.18.7.el6.x86_64 does not boot in Xen PV mode

Problems start before any of the kaiser code executes, though it could still be related to CONFIG_KAISER since that has effects beyond kaiser.c. --- (early) Initializing cgroup subsys cpuset (early) Initializing cgroup subsys cpu (early) Linux version 2.6.32-696.18.7.el6.x86_64

Re: [CentOS-virt] CentOS-virt - Kernel Side-Channel Attacks

On 01/04/2018 10:49 AM, Akemi Yagi wrote: > On Thu, Jan 4, 2018 at 9:51 AM, wrote: > >> Please patch the CentOS-virt Kernel to fix the >> Kernel Side-Channel Attacks vulnerabilities. >> >> The latest CentOS-virt kernel was released in November, as seen below. >> >>

Re: [CentOS-virt] Live migration haswell, broadwell

On 11/14/2017 03:13 AM, T.Weyergraf wrote: > Hi > > I wonder, if live migration (back and forth) is possible on mixed Haswell > (Xeon V3) and Broadwell (Xeon V4) installations. The only notable difference > between the two is apparently a working TSX implementation on V4, which got > disabled

[CentOS-virt] Crash in network stack under Xen

Hi, We had a potentially network related crash on a dom0 with Linux 4.9.39 / Xen 4.8 and as of today I can't find any fixes in stable/linux-4.9.y, xen/staging-4.8, or CPU microcode updates that look like a smoking gun. I can't rule out that it's Xen related. The backtraces are: [

Re: [CentOS-virt] Stability issues since moving to 4.6 - Kernel paging request bug + VM left in null state

On 11/07/2017 04:57 PM, Sarah Newman wrote: > On 11/07/2017 03:12 PM, Nathan March wrote: >> Since moving from 4.4 to 4.6, I've been seeing an increasing number of >> stability issues on our hypervisors. I'm not clear if there's a singular >> root cause here, or if I'm deali

Re: [CentOS-virt] Stability issues since moving to 4.6 - Kernel paging request bug + VM left in null state

On 11/07/2017 03:12 PM, Nathan March wrote: > Since moving from 4.4 to 4.6, I've been seeing an increasing number of > stability issues on our hypervisors. I'm not clear if there's a singular > root cause here, or if I'm dealing with multiple bugs. > > > > One of the more common ones I've

Re: [CentOS-virt] Xen 4.6.3-15 packages, including XSAs 216-219, 221-225 on their way through the build system

On 06/20/2017 05:06 AM, George Dunlap wrote: > Xen 4.6.3-15 packages for CentOS 6 and CentOS 7 are on their way > through the build system. They should show up in centos-virt-testing > in a few hours, and in the main mirrors tomorrow morning (God > willing). > > These contain several critical

Re: [CentOS-virt] xen4centos kernel version / debuginfo

On 06/12/2017 03:25 PM, Kevin Stange wrote: > On 06/12/2017 05:17 PM, Sarah Newman wrote: >> Is there any problem moving to 4.9.31? This contains upstream commits >> f2e767bb5d6ee0d9 for mpt3sas and >> 69861e0a52f87333 for dom0 memory mappings. > > 4.9.31-27 is tagged

[CentOS-virt] Crash in CentOS 7 kernel-3.10.0-514.16.1.el7.x86_64 in Xen PV mode

I experienced a bug that is likely the same as https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1350373 . Commit b7dd0e350e0bd4c0fddcc9b8958342700b00b168 , which is supposed to fix it, doesn't appear in this kernel and doesn't apply cleanly either. Is there any point in trying to backport

Re: [CentOS-virt] 4.9 kernel fails to boot because it didn't have the mpt3sas module

On 05/17/2017 01:30 PM, Jerry wrote: > For some reason each of the 5, 6 & 7 releases have issues with the mpt2sas > driver (there isn't enough swiotlb allocated by default for the driver to > work properly, and the units for that parameter changed between 5 and 6). > It's like this driver has bad

Re: [CentOS-virt] 4.9 kernel fails to boot because it didn't have the mpt3sas module

On 05/16/2017 09:04 PM, Jerry wrote: > > Turns out dracut was unable to mount the root file system. So I went back > into the 3.10 kernel again to see if the mpt2sas or mpt3sas driver was in > its initramfs file... and it wasn't: > > > $ sudo lsinitrd -k 4.9.25-27.el7.x86_64 | grep mpt >

[CentOS-virt] centos-virt IRC meetings

Hi, We were hoping to attend an IRC meeting this morning but it looks like that didn't happen. Has this been moved to once a month or was this a special week? Thanks, Sarah ___ CentOS-virt mailing list CentOS-virt@centos.org

Re: [CentOS-virt] NIC Stability Problems Under Xen 4.4 / CentOS 6 / Linux 3.18

On 03/16/2017 04:22 PM, Kevin Stange wrote: >> I still can't rest assured the NIC issue is fixed, but no 4.4 or 4.9 >> server has yet had a NIC issue, with some being up almost a full month. >> It looks promising! (I'm knocking on all the wood everywhere, though.) > > I'm ready to call this

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

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,

Re: [CentOS-virt] xen 4.7 or 4.8

On 02/18/2017 06:23 AM, Johnny Hughes wrote: > On 02/18/2017 02:07 AM, Christoph wrote: >> >> Hi >> >> are there somewhere pkgs with xen 4.7 or 4.8 for centos7? >> > > The SIG has agreed to maintain every other release (even numbered release) of > Xen. So there will be a 4.8 set of packages

Re: [CentOS-virt] Selinux Problem

On 01/30/2017 03:22 AM, George Dunlap wrote: > > I think that comment may be a little old. I do try to support SELinux > -- the smoke tests I use before pushing changes have it enabled by > default, and they use both qemu-xen and blktap. > > But it's difficult to help debug problems when you

Re: [CentOS-virt] Selinux Problem

On 01/26/2017 08:45 AM, Sarah Newman wrote: > On 01/26/2017 08:06 AM, Günther J. Niederwimmer wrote: >> Hello, >> >> CentOS 7.(3) Xen 4.4, >> >> Can I find any Doc for selinux with XEN, I found many Problems with selinux >> on >> Dom0 ? >>

Re: [CentOS-virt] Selinux Problem

On 01/26/2017 08:06 AM, Günther J. Niederwimmer wrote: > Hello, > > CentOS 7.(3) Xen 4.4, > > Can I find any Doc for selinux with XEN, I found many Problems with selinux > on > Dom0 ? > > Or have I to disable selinux when I install XEN. > > Thank's for a answer. > What problems and what

[CentOS-virt] Xen4CentOS kernel-debuginfo

I think this may have been asked before, but what would it take to get debuginfo packages built for the Xen4CentOS kernels? If it's just a patch for kernel.spec file that nobody has gotten around to, what is the best starting place for making that patch? Thanks, Sarah

Re: [CentOS-virt] how to enable auto-start on newer versions of Xen ?

On 08/23/2016 01:10 PM, Sarah Newman wrote: > On 08/23/2016 12:59 PM, Craig Thompson wrote: > >> I was thinking that in iterations past, it was possible just to run the >> hypervisor, put a symlink in /etc/xen/auto, and VMs would be auto-started >> upon reboot. Maybe I'

Re: [CentOS-virt] how to enable auto-start on newer versions of Xen ?

On 08/23/2016 12:59 PM, Craig Thompson wrote: > I was thinking that in iterations past, it was possible just to run the > hypervisor, put a symlink in /etc/xen/auto, and VMs would be auto-started > upon reboot. Maybe I'm wrong, and maybe those older boxes had libvirt > installed on them, too.

Re: [CentOS-virt] Soft lockups with Xen4CentOS 3.18.25-18.el6.x86_64

On 03/10/2016 12:05 AM, Sarah Newman wrote: > On 03/09/2016 08:15 PM, Sarah Newman wrote: >> I've been running 3.18.25-18.el6.x86_64 + our build of xen 4.4.3-9 on one >> host for the last couple of weeks and have gotten several soft lockups >> within the last 24 hours. I

Re: [CentOS-virt] Soft lockups with Xen4CentOS 3.18.25-18.el6.x86_64

On 03/09/2016 08:15 PM, Sarah Newman wrote: > I've been running 3.18.25-18.el6.x86_64 + our build of xen 4.4.3-9 on one > host for the last couple of weeks and have gotten several soft lockups > within the last 24 hours. I am posting here first in case anyone else has > experien

[CentOS-virt] Soft lockups with Xen4CentOS 3.18.25-18.el6.x86_64

I've been running 3.18.25-18.el6.x86_64 + our build of xen 4.4.3-9 on one host for the last couple of weeks and have gotten several soft lockups within the last 24 hours. I am posting here first in case anyone else has experienced the same issue. Here is the first instance: sched: RT

Re: [CentOS-virt] XSAs 170 and 154, repository layouts, and centos-release-xen 8-1

On 02/17/2016 04:30 AM, George Dunlap wrote: > I have the following packages going through the CBS: > * A CentOS 7 xen-4.6.1-2, with XSAs 170 and 154 > * A CentOS 6 xen-4.6.1-2, with XSAs 170 and 154 > * A CentOS 6 xen-4.4.3-11, with XSAs 170 > > All these should show up in mirrors hopefully

Re: [CentOS-virt] CentOS 6 Virt SIG Xen 4.6 packages available in centos-virt-xen-testing

On 01/21/2016 04:32 AM, George Dunlap wrote: > I'm a developer, not a server admin, so I can't gauge how important > this issue is. Before making such a change, I'd like to hear opinions > from other people in the community about how important (or not) it is > to avoid breaking xm, given the

[CentOS-virt] Xen4CentOS and XSA-142

It looks like no XSA-142 patch, which is "libxl fails to honour readonly flag on disks with qemu-xen" has been applied to Xen4CentOS. I assume this was on purpose? If not, I can have someone try adding the original patch from http://xenbits.xen.org/xsa/advisory-142.html and some variant of the

Re: [CentOS-virt] 3.18.21-16 upgrade, kernel panic, unable to mount root fs

On 11/01/2015 12:07 PM, Karel Hendrych wrote: > Hi, just a heads-up: 3.18.21 didn't boot up on HP ML310e Gen8 v2, SATA drives > in AHCI mode, / on software raid 1, no LVM. It ended up in kernel panic > with unable to mount root fs. Attached. No difference in grub kernel/xen > settings. > > I

[CentOS-virt] Changelog for xen-4.4.3-3

Just a heads up, the changelog for the xen package says * Thu Oct 22 2015 George Dunlap - 4.4.3-2.el6.centos - Import XSAs 149-153 The source RPM also has the patch for XSA 148, as shown in the git log. Regards, Sarah ___

Re: [CentOS-virt] How to kickstart a guest with Centos 6.6 Xen 4.4

On 07/30/2015 05:29 AM, Elliot Fox wrote: The TL;DR is: Everything I've found to kickstart a new vanilla rhel/centos guest points to specifying a kernel and initrd- for RHEL/Centos 5. But where is the xen initrd for Centos 6? The Xen4Quickstart instructions are awesome, but after install

Re: [CentOS-virt] /var/lib/xenstored Xen4CentOS

On 06/04/2015 08:32 AM, George Dunlap wrote: for i in {1..80} ; do xl create null.cfg name=\t$i\ kernel=\/boot/vmlinuz-3.18.12-11.el7.x86_64\ memory=\40\ on_crash=\preserve\ ; done And then used the shell snippet from the bug report to generate load: while true; do xl list /dev/null;

[CentOS-virt] /var/lib/xenstored Xen4CentOS

By default, /var/lib/xenstored is mounted tmpfs in centos 5 but this doesn't appear to be true for Xen4CentOS. This can cause performance issues as mentioned in https://bugzilla.redhat.com/show_bug.cgi?id=446089 I'm not sure if this should be part of xencommons, but if not, adding a tmpfs mount

Re: [CentOS-virt] CentOS 6 VM image for paravirtualizaton on CentOS Xen server

On 03/15/2015 03:25 PM, Nico Kadel-Garcia wrote: So I'm right back to my effectively unanswered original questions. So please: I asked a very specific pair of questions, and they remain unanswered. CentOS 5 Xen server (hypervisor, or Dom0, whatever we want to call it this week): Does CentOS 6

Re: [CentOS-virt] CentOS 6 VM image for paravirtualizaton on CentOS Xen server

On 03/15/2015 07:39 PM, Nico Kadel-Garcia wrote: On Sun, Mar 15, 2015 at 8:26 PM, Sarah Newman s...@prgmr.com wrote: On 03/15/2015 03:25 PM, Nico Kadel-Garcia wrote: So I'm right back to my effectively unanswered original questions. So please: I asked a very specific pair of questions