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[Qemu-devel] [PATCH v3 00/16] vhost-user: add migration log support (for


From: marcandre . lureau
Subject: [Qemu-devel] [PATCH v3 00/16] vhost-user: add migration log support (for 2.5)
Date: Thu, 6 Aug 2015 14:40:36 +0200

From: Marc-André Lureau <address@hidden>

Hi,

The following series implement shareable log for vhost-user to support
memory tracking during live migration. On qemu-side, the solution is
fairly straightfoward since vhost already supports the dirty log, only
vhost-user couldn't access the log memory until then.

The series is based on top of "protocol feature negotiation" series
proposed earlier by Michael S. Tsirkinm and "vhost user: Add live
migration" series from Thibaut Collet .

Since v2:
- changed some patch summary
- added migration tests
- added a patch to replace error message with a trace

The development branch I used is:
https://github.com/elmarco/qemu branch "vhost-user"

More comments welcome!

Marc-André Lureau (16):
  configure: probe for memfd
  util: add linux-only memfd fallback
  util: add memfd helpers
  vhost: alloc shareable log
  vhost: document log resizing
  vhost: use variable arguments for vhost_call()
  vhost-user: start and end the va_list
  vhost-user: send log shm fd along with log_base
  vhost-user: document migration log
  net: add trace_vhost_user_event
  vhost-user-test: move wait_for_fds() out
  vhost-user-test: remove useless static check
  vhost-user-test: wrap server in TestServer struct
  vhost-user-test: learn to tweak various qemu arguments
  vhost-user-test: add live-migration test
  vhost-user-test: check ownership during migration

 configure                         |  19 ++
 docs/specs/vhost-user.txt         |  42 +++++
 hw/virtio/vhost-backend.c         |   4 +-
 hw/virtio/vhost-user.c            |  52 ++++--
 hw/virtio/vhost.c                 |  45 ++++-
 include/hw/virtio/vhost-backend.h |   6 +-
 include/hw/virtio/vhost.h         |   3 +-
 include/qemu/memfd.h              |  24 +++
 net/vhost-user.c                  |   5 +-
 tests/vhost-user-test.c           | 366 +++++++++++++++++++++++++++++++-------
 trace-events                      |   3 +
 util/Makefile.objs                |   2 +-
 util/memfd.c                      | 126 +++++++++++++
 13 files changed, 602 insertions(+), 95 deletions(-)
 create mode 100644 include/qemu/memfd.h
 create mode 100644 util/memfd.c

-- 
2.4.3




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