Thanks Sarah. Your suggestions 2) and 3) appear to have solved my problem. John Sent: Tuesday, February 27, 2018 at 12:48 PM From: "Sarah Newman" <srn at prgmr.com> To: "John Vetter" <john.vetter at mail.com> Cc: "Discussion about the virtualization on CentOS" <centos-virt at centos.org> Subject: 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. built linux kernel 4.13.x and installed it (using make install) > 3. built xen 4.7.x and installed it (using make install). > grub2-mkconfig and grub-bootxen.sh don't seem to be picking up the combination > of new kernel and new xen and making an entry in the grub.cfg file. > It did make an entry for the new Xen with the kernel installed with xen4centos. > I looked at the grub-bootxen.sh script but was unable to figure a way out. How > do I get the installation scripts to make an entry for my new kernel and new Xen? I would suggest one of 1. Run the scripts with -x to figure out where they're quitting early 2. Make an rpm for the kernel you're building, or 3. Manually edit the grub files and run dracut. It's not hard to do what those scripts do by hand. --Sarah