This is the current memory queue (posted as two separate series before my vacation). When applied, the overhead of 16 bytes/page is reduced to basically nil.
Please pull from: git://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git memory/core v2: fix memory corruption in first patch ---------------------------------------------------------------- Avi Kivity (30): ioport: change portio_list not to use memory_region_set_offset() memory: remove memory_region_set_offset() memory: add shorthand for invoking a callback on all listeners memory: switch memory listeners to a QTAILQ memory: code motion: move MEMORY_LISTENER_CALL() memory: move ioeventfd ops to MemoryListener memory: add a readonly attribute to MemoryRegionSection memory: don't pass ->readable attribute to cpu_register_physical_memory_log memory: use a MemoryListener for core memory map updates too memory: drop AddressSpaceOps memory: allow MemoryListeners to observe a specific address space xen: ignore I/O memory regions memory: split memory listener for the two address spaces memory: support stateless memory listeners memory: change memory registration to rebuild the memory map on each change memory: remove first level of l1_phys_map memory: unify phys_map last level with intermediate levels memory: store MemoryRegionSection pointers in phys_map memory: compress phys_map node pointers to 16 bits memory: fix RAM subpages in newly initialized pages memory: unify the two branches of cpu_register_physical_memory_log() memory: move tlb flush to MemoryListener commit callback memory: make phys_page_find() return a MemoryRegionSection memory: give phys_page_find() its own tree search loop memory: simplify multipage/subpage registration memory: replace phys_page_find_alloc() with phys_page_set() memory: switch phys_page_set() to a recursive implementation memory: change phys_page_set() to set multiple pages memory: unify PhysPageEntry::node and ::leaf memory: allow phys_map tree paths to terminate early exec-obsolete.h | 5 +- exec.c | 875 ++++++++++++++++++++++++++++++++++++------------------- hw/vhost.c | 33 ++- ioport.c | 28 ++- ioport.h | 1 + kvm-all.c | 97 ++++++- memory.c | 328 +++++++++------------- memory.h | 26 +- xen-all.c | 33 ++- 9 files changed, 912 insertions(+), 514 deletions(-) -- error compiling committee.c: too many arguments to function