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[Qemu-devel] [RFC v2 0/8] Rework vhost memory region updates
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[Qemu-devel] [RFC v2 0/8] Rework vhost memory region updates |
Date: |
Fri, 8 Dec 2017 20:32:49 +0000 |
From: "Dr. David Alan Gilbert" <address@hidden>
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
- [Qemu-devel] [RFC v2 0/8] Rework vhost memory region updates,
Dr. David Alan Gilbert (git) <=
- [Qemu-devel] [RFC v2 1/8] memory: address_space_iterate, Dr. David Alan Gilbert (git), 2017/12/08
- [Qemu-devel] [RFC v2 2/8] vhost: Move log_dirty check, Dr. David Alan Gilbert (git), 2017/12/08
- [Qemu-devel] [RFC v2 3/8] vhost: Simplify ring verification checks, Dr. David Alan Gilbert (git), 2017/12/08
- [Qemu-devel] [RFC v2 4/8] vhost: New memory update functions, Dr. David Alan Gilbert (git), 2017/12/08
- [Qemu-devel] [RFC v2 6/8] vhost: Compare and copy updated region data into device state, Dr. David Alan Gilbert (git), 2017/12/08
- [Qemu-devel] [RFC v2 5/8] vhost: update_mem_cb implementation, Dr. David Alan Gilbert (git), 2017/12/08
- [Qemu-devel] [RFC v2 7/8] vhost: Remove old vhost_set_memory etc, Dr. David Alan Gilbert (git), 2017/12/08
- [Qemu-devel] [RFC v2 8/8] vhost: Move mem_sections maintenance into commit/update routines, Dr. David Alan Gilbert (git), 2017/12/08
- Re: [Qemu-devel] [RFC v2 0/8] Rework vhost memory region updates, Igor Mammedov, 2017/12/11