From: "Dr. David Alan Gilbert" <dgilb...@redhat.com> Hi, This is an experimental set that reworks the way the vhost code handles changes in physical address space layout that came from a discussion with Igor.
It's intention is to simplify a lot of the update code, and to make it easier for the postcopy+shared code to do the hugepage alignments that are needed. Instead of updating and trying to merge sections of address space on each add/remove callback, we wait until the commit phase and go through and rebuild a list by walking the Flatview of memory and end up producing an ordered list. We compare the list to the old list to trigger updates. This is pretty lightly tested (not least because I can't get vhost-user+hot-add memory to survive even upstream). v2 Incorporate changes and code from Igor, in particular the simpler ring verification checks and thus the removal of the complex comparison code. Dave Dr. David Alan Gilbert (8): memory: address_space_iterate vhost: Move log_dirty check vhost: Simplify ring verification checks vhost: New memory update functions vhost: update_mem_cb implementation vhost: Compare and copy updated region data into device state vhost: Remove old vhost_set_memory etc vhost: Move mem_sections maintenance into commit/update routines hw/virtio/trace-events | 7 + hw/virtio/vhost.c | 504 ++++++++++++++++------------------------------ include/exec/memory.h | 23 +++ include/hw/virtio/vhost.h | 3 - memory.c | 22 ++ 5 files changed, 229 insertions(+), 330 deletions(-) -- 2.14.3