Re: [CentOS-virt] Centos 7 newer kernel needed
Hello Xlord, The CPU does have VT support and I already have the nested KVM enabled. Checking the Linux Kernel release notes I saw that the nested kvm feature was implemented in 3.10 but he EPT support is in 3.12. So Centos 7's kernel which is 3.10 does have the EPT support? Is there a way to check that the EPT support is available in the kernel? Thank you, Laurentiu On Thu, Aug 4, 2016, 06:04 -=X.L.O.R.D=- wrote: > Dear Laurentiu, > > Please check below info since assume your CentOS7 box CPU processor > already VT supported in advance. > > 1) Checkpoint #1: Hardware and Kernel modules > > a. cat /proc/cpuinfo | grep vmx > > b. cat /sys/module/kvm_intel/parameters/nested (if “N” then go to > checkpoint #2) > > 2) Checkpoint #2: Assume your CentOS box support > > *a. **echo 'options kvm-intel nested=y' >> /etc/modprobe.d/*dist.conf > > b. modprobe kvm-intel > > 3) Checkpoint #3: Verification > > a. Reboot yout CentOS box > > b. cat /sys/module/kvm_intel/parameters/nested (if “Y” then you can carry > one process the KVM installation. > > > > PS: Source: > https://lalatendu.org/2015/11/01/kvm-nested-virtualization-in-fedora-23/ > which should be very similar with CentOS and CentOS 7 already capable with on > with KVM Nested EPT with CPU pass-through options supported. Hope that helps > & cheers!! > > Xlord > > > > *From:* centos-virt-boun...@centos.org [mailto: > centos-virt-boun...@centos.org] *On Behalf Of *Laurentiu Soica > *Sent:* Thursday, August 4, 2016 3:07 AM > *To:* centos-virt@centos.org > *Subject:* [CentOS-virt] Centos 7 newer kernel needed > > > > Hello, > > I am looking for a Linux kernel for Centos 7 that implements a feature > introduced in kernel version 3.12: > > "nested EPT support to KVM's nested VMX." > > If anyone has used this feature with Centos 7, please let me know. > > Laurentiu > ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Centos 7 newer kernel needed
Dear Laurentiu, Please check below info since assume your CentOS7 box CPU processor already VT supported in advance. 1) Checkpoint #1: Hardware and Kernel modules a. cat /proc/cpuinfo | grep vmx b. cat /sys/module/kvm_intel/parameters/nested (if “N” then go to checkpoint #2) 2) Checkpoint #2: Assume your CentOS box support a. echo 'options kvm-intel nested=y' >> /etc/modprobe.d/dist.conf b. modprobe kvm-intel 3) Checkpoint #3: Verification a. Reboot yout CentOS box b. cat /sys/module/kvm_intel/parameters/nested (if “Y” then you can carry one process the KVM installation. PS: Source: https://lalatendu.org/2015/11/01/kvm-nested-virtualization-in-fedora-23/ which should be very similar with CentOS and CentOS 7 already capable with on with KVM Nested EPT with CPU pass-through options supported. Hope that helps & cheers!! Xlord From: centos-virt-boun...@centos.org [mailto:centos-virt-boun...@centos.org] On Behalf Of Laurentiu Soica Sent: Thursday, August 4, 2016 3:07 AM To: centos-virt@centos.org Subject: [CentOS-virt] Centos 7 newer kernel needed Hello, I am looking for a Linux kernel for Centos 7 that implements a feature introduced in kernel version 3.12: "nested EPT support to KVM's nested VMX." If anyone has used this feature with Centos 7, please let me know. Laurentiu ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] Centos 7 newer kernel needed
Hello, I am looking for a Linux kernel for Centos 7 that implements a feature introduced in kernel version 3.12: "nested EPT support to KVM's nested VMX." If anyone has used this feature with Centos 7, please let me know. Laurentiu ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Lost a NIC on start
On Tue, Aug 2, 2016 at 4:12 AM, Günther J. wrote: > Hello, > > CentOS 7.2 > > I have a big Problem with libvirt or KVM, my Virtual Hosts lost sometime a NIC > on start. What does "lose a NIC" mean? Does it mean that device doesn't show up at all, and is not apparent with "/sbin/ifconfig -a" ? Or does it mean that the device is not properly configured with IP address and connected to the local network? I've certainly noticed with various virtualization systems and CentOS 6 that sometimes DHCP doesn't get configured in the very short time between the VM booting and the prompt being available. It always recovers with a "/sbin/service network restart". > I have configured 4 NIC on the Virtual host two passthru and 2 virtual, on > start most time i lost a virtual NIC :-( > > So after a reboot I have to check always is all running and working.? > > with a "virsh reboot " in the most time it come back ? > > Have any a Idea why ? > > I found nothing in the Logs :-(. > > -- > mit freundlichen Grüßen / best regards, > > Günther J. Niederwimmer > ___ > CentOS-virt mailing list > CentOS-virt@centos.org > https://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Downgrading from Xen 4.6 to 4.5
On 08/03/2016 05:35 AM, Francis Greaves wrote: > Dear All > I have an up to date CentOS 7 with Xen 4.6 > I have noticed in some posts here and there that PCI Passthrough is not > working in 4.6 for some people, but is working in 4.5 > How can I downgrade to Xen 4.5 so I can test this out? > Many thanks We do not provide a CentOS-7 version of Xen lower than 4.6. At the time we started Xen support on CentOS-7, 4.6 was already stable and that was our first release for CentOS-7. We do currently have both Xen-4.4 and Xen-4.6 for CentOS-6. The Virt SIG produces 'even' versions of Xen (so 4.4, 4.6, 4.8) as well as a newer libvirt and kernel. signature.asc Description: OpenPGP digital signature ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] Downgrading from Xen 4.6 to 4.5
Dear All I have an up to date CentOS 7 with Xen 4.6 I have noticed in some posts here and there that PCI Passthrough is not working in 4.6 for some people, but is working in 4.5 How can I downgrade to Xen 4.5 so I can test this out? Many thanks Francis ___ CentOS-virt mailing list CentOS-virt@centos.org https://lists.centos.org/mailman/listinfo/centos-virt
