Dear colleagues, just to inform you about a problem I have/had:
Xen host: SL5 kernel-xen-2.6.18-419.el5.x86_64 ,xen-3.0.3-148.el5_11.x86_64, libvirt-0.8.2-29.el5_9.1.x86_64 Xen guest: SL6 kernel 2.6.32-696.16.1.el6.x86_64, kernel-firmware-2.6.32-696.18.7.el6 Guest runs fine. yum update -> kernel-2.6.32-696.18.7.el6.x86_64 Guest does not boot. Using the graphical virt-manager display you don't see anything. Only machine crashed. Workaround: Add extra = "(hd0)/boot/grub/menu.lst" to /etc/xen/guest xm create -c guest Select older kernel, boot, yum remove kernel-2.6.32-696.18.7.el6.x86_64 Perhaps a problem with Spectre/Meltdown handling? -- Andreas Manschke Universitaet Bremen