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--- virtualization:xenserver:xenserver_add_host_to_pool [2015/03/03 07:44]
gcooper
+++ virtualization:xenserver:xenserver_add_host_to_pool [2015/11/20 08:23] (current)
gcooper
@@ Line 42: / Line 42: @@
 Then join the new host using XenCenter.
-===== Heterogeneous Pools =====
+===== Heterogeneous CPU Pooling =====
 http://support.citrix.com/article/CTX127059
@@ Line 63: / Line 63: @@
 <file>
-wget http://www.citrix.com/static/ready/downloads/XenServer_Heterogeneous_CPU_Pool_self-test_kit_Oct19.zip
+wget http://www.cl.cam.ac.uk/xen/XenE/host-cpu-info/compare-cpu
-unzip XenServer_Heterogeneous*
 chmod +x compare-cpu
 </file>
@@ Line 84: / Line 83: @@
 Once the mask is applied and the member servers rebooted, you can use XenCenter to add the new host and it will offer to apply the appropriate mask to the new server.
+To reset the CPU Features mask: {{ :virtualization:xenserver:xenserver_incompatible_hardware_message.png?direct&500|Incompatible Hardware}}
+<file>
+xe host-reset-cpu-features
+</file>
+==== CPU Masking Problems ====
+If you have problems getting the CPU mask to 'stick' after a reboot of a particular XenServer, try this:
+Edit ''/boot/extlinux.conf''.
+Add ''xsave=1'' in the Xen options (first grouping before the three dashes) like in this snippet:
+<file>
+label xe
+  # XenServer
+  kernel mboot.c32
+  append /boot/xen.gz dom0_mem=4096M,max:4096M watchdog dom0_max_vcpus=4 crashkernel=128M@32M cpuid_mask_xsave_eax=0 xsave=1 console=vga vga=mode-0x0311 cpuid_mask_ecx=0x00802009 cpuid_mask_ext_ecx=0x000037ff --- /boot/vmlinuz-3.10-xen root=LABEL=root-rwtanwlk ro hpet=disable xencons=hvc console=hvc0 console=tty0 quiet vga=785 splash --- /boot/initrd-3.10-xen.img
+</file>
+Then apply your mask again and see if it 'sticks' after a reboot.
+This worked at least once on a newer XenServer host with a fully patched XenServer 6.5 installation and an AMD Opteron 6320 CPU.

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