Hi,
I have made the for-centos-v5 branch available on
git://xenbits.xen.org/people/dvrabel/linux.git
This is based on 3.4.54 and includes the following additional fixes (since the for-centos-v4 branch).
* x86/xen: during early setup, only 1:1 map the ISA region
Fixes a boot failure if tboot is used.
* xen/evtchn: avoid a deadlock when unbinding an event channel
Fixes a potential deadlock by users (e.g., qemu, xenstored) of /dev/xen/evtchn.
You may also wish to consider enabling CONFIG_XEN_BALLOON_MEMORY_HOTPLUG. The kernel bug that was causing problems is already fixed (by xen/balloon: Subtract from xen_released_pages the count that is populated) and now that dom0 will not try to auto-balloon by default, enabling this option should no longer cause problems in dom0.
This option is required to increase the amount of memory in a guest using this kernel above the initial amount.
David