This is VMware physical memory management driver which acts like a
"balloon" that can be inflated to reclaim physical pages by reserving
them in the guest and invalidating them in the monitor, freeing up the
underlying machine pages so they can be allocated to other guest
Best of my knowledge you have to run a paravirtualized guest to have it take advantage of memory adjustment. For PV guests you have to load the xen-balloon kernel module to catch memory adjustments. [by TrevorH]
You are running `free` on Dom0 and this is actually a specialised DomU guest so only reports what Xen wishes it to see. The amount of memory reported by xm top is correct and what is really detecte... [by TrevorH]
I have an application that reserves a contiguous memory block using VirtualAllocEx on Windows with the MEM_RESERVE flag. This reserves a virtual memory block, but does not back it with a physical page or page file chunk.
First impression of relase candidate: Fedora 12 seems to be fine!
Reasons for Fedora 12:
I've chosed fedora (12) because of "unofficial?" dom0 support provided by m.young.
I would like to use fedora 12 as (xen) host for virtual guests (centos 5.x) because of "better" hardware support in newer (dom0) kernels.