I've just posted some new kernel-xen RPMs based on 18.104.22.168.
* Sat Sep 17 2011 Steven Haigh
- Revert "xen/apic: Provide an 'apic_xen' to set the override the apic->[read|write] for all cases." - Merged in 22.214.171.124 fixes: igb: Fix lack of flush after register write and before delay fuse: check size of FUSE_NOTIFY_INVAL_ENTRY message drm/ttm: fix ttm_bo_add_ttm(user) failure path x86, UV: Remove UV delay in starting slave cpus x86-32, vdso: On system call restart after SYSENTER, use int $0x80 futex: Fix regression with read only mappings ALSA: ac97: Add HP Compaq dc5100 SFF(PT003AW) to Headphone Jack Sense whitelist ALSA: snd_usb_caiaq: track submitted output urbs befs: Validate length of long symbolic links. fs/partitions/efi.c: corrupted GUID partition tables can cause kernel oops perf tools: do not look at ./config for configuration mm: fix wrong vmap address calculations with odd NR_CPUS values ALSA: snd-usb-caiaq: Correct offset fields of outbound iso_frame_desc hwmon: (ibmaem) add missing kfree atm: br2864: sent packets truncated in VC routed mode USB: Serial: Added device ID for Qualcomm Modem in Sagemcom's HiLo3G USB: usb-storage: unusual_devs entry for ARM V2M motherboard. USB: assign instead of equal in usbtmc.c USB: xhci: fix OS want to own HC
The guide can be found here.