Hello, OK. Thank you both for answering. I have enough information now to decide next if a kernel upgrade is required in my case or not.
I think the decision will be based on whether the 2nd level of virtualization performs fast enough and without issues. Have a great day, Laurentiu On Fri, Aug 5, 2016, 08:32 -=X.L.O.R.D=- <xlord...@gmail.com> wrote: > Dear Laurentiu, > Agree with Johnny for kernel upgrade if upgrade helps, alternative if 3.10 > or above already supported it, you can check from kernel parameter or > options if they are disabled on purpose. > You can do that via the "make menuconfig" via > "https://wiki.centos.org/HowTos/I_need_the_Kernel_Source"; or > "https://wiki.centos.org/HowTos/BuildingKernelModules";. Hope that helps! > > Xlord > -----Original Message----- > From: centos-virt-boun...@centos.org [mailto: > centos-virt-boun...@centos.org] > On Behalf Of Johnny Hughes > Sent: Thursday, August 4, 2016 9:10 PM > To: centos-virt@centos.org > Subject: Re: [CentOS-virt] Centos 7 newer kernel needed > > On 08/04/2016 07:30 AM, Laurentiu Soica wrote: > > Hi Xlord, > > > > Yes, the CPU has support for EPT. > > > > I wrongly thought that the nested EPT was first introduced in 3.12. > > Following your instructions I see that I have it enabled on my system > > as well. > > > > However, checking the kernel commits from 3.12 on search string > > 'nested ept' I found about 10 code changes/fixes for nested EPT. > > > > https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/l > > og/?id=refs%2Ftags%2Fv3.12.62&qt=grep&q=Nested+ept > > > > What options do I have to get this commits on a Centos 7 kernel? > > The Standard CentOS kernel is built from the source code and configuration > files of the released RHEL kernel. The only way to get things into the > main > CentOS kernel is for it to be in the RHEL source code. > > Red Hat does backport changes into the RHEL kernel, so if they support > nested those changes or ones like it may be there. See Backporting: > > https://access.redhat.com/security/updates/backporting > > We do have a CentOSPlus kernel, maintained by a volunteer (hi toracat). > She will take potential patches here if you have something that works: > > https://bugs.centos.org/view.php?id=6828 > > Also, if you want to try a newer kernel, we do have 2 available. I manage > both of these kernels, they are both based on an LTS version of the kernel > from kernel.org .. but neither gets nearly the attention (or smart people > looking at them) as the RHEL based kernel. If you want to try either of > them, they are in: > > 3.18.x LTS: > http://mirror.centos.org/centos/7/virt/x86_64/xen-46/ > > 4.4.x LTS: > http://mirror.centos.org/altarch/7.2.1511/experimental/x86_64/Packages/ > > Those kernels both work, I am running both on production machines .. but I > am not a kernel hacker, so I just build what the upstream LTS kernel > maintainer releases. They may or may not do what you want. > > The RHEL kernel team does a lot of work to make sure the RHEL kernel > > Thanks, > Johnny Hughes > > >
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