HI, We've started to see several issues with the Xen releases. Going back to basics I've used this guide https://wiki.centos.org/HowTos/Xen/Xen4QuickStart Once the install process is complete the grub.conf looks like this: default=0 timeout=5 splashimage=(hd0,0)/boot/grub/splash.xpm.gz hiddenmenu title CentOS (3.18.21-17.el6.x86_64) root (hd0,0) kernel /boot/xen.gz dom0_mem=1024M,max:1024M cpuinfo com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all module /boot/vmlinuz-3.18.21-17.el6.x86_64 ro root=/dev/vda1 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet title CentOS (2.6.32-573.12.1.el6.x86_64) root (hd0,0) kernel /boot/vmlinuz-2.6.32-573.12.1.el6.x86_64 ro root=/dev/vda1 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /boot/initramfs-2.6.32-573.12.1.el6.x86_64.img title CentOS (2.6.32-358.el6.x86_64) root (hd0,0) kernel /boot/vmlinuz-2.6.32-358.el6.x86_64 ro root=UUID=71b203ab-36ea-4aa8-9ba3-78e4109f0ca4 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /boot/initramfs-2.6.32-358.el6.x86_64.img As you can see the missing module line. If i manually run grub-bootxen.sh nothing changes. Manually adding the missing module entry: module /boot/initramfs-3.18.21-17.el6.x86_64.img Causes the following: https://www.dropbox.com/s/ley5nj29ubwqogc/Screenshot%202015-12-20%2011.10.11.png?dl=0 Disabling APIC gives the following console output: https://www.dropbox.com/s/a6zgioxl9xpg20y/Screenshot%202015-12-20%2011.15.29.png?dl=0 Now i know this is inside a KVM virtual machine, however we are starting to see this issue on at least 7 standard dedicated servers. [root at test ~]# rpm -qa | grep xen xen-libs-4.4.3-9.el6.x86_64 xen-hypervisor-4.4.3-9.el6.x86_64 xen-4.4.3-9.el6.x86_64 centos-release-xen-7-11.el6.x86_64 xen-licenses-4.4.3-9.el6.x86_64 xen-runtime-4.4.3-9.el6.x86_64 [root at test ~]# cat /etc/redhat-release CentOS release 6.7 (Final) [root at test ~]# [root at test ~]# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz stepping : 10 microcode : 1 cpu MHz : 2666.352 cache size : 4096 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx lm constant_tsc arch_perfmon unfair_spinlock pni ssse3 cx16 sse4_1 x2apic xsave hypervisor lahf_lm bogomips : 5332.70 -- Regards, Phill -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20151220/58c362cb/attachment-0003.html>
