[dpdk-dev] [PATCH v4 0/5] vhost: handle memory hotplug for async vhost

[Cheng Jiang <cheng1.jiang@intel.com>]

When the guest memory is hotplugged, the vhost application which
enables DMA acceleration must stop DMA transfers before the vhost
re-maps the guest memory.

This patch set is to provide an unsafe API to drain in-flight pkts
which are submitted to DMA engine in vhost async data path, and
notify the vhost application of stopping DMA transfers. And enable it
in vhost example.

v4:
 * rebased on the latest codess
v3:
 * added a patch to fix async ops return type
 * fixed async ops fail handler
 * updated the doc
v2:
 * changed the patch structure

Cheng Jiang (4):
  vhost: fix async vhost ops return type
  vhost: add unsafe API to drain pkts in async vhost
  examples/vhost: handle memory hotplug for async vhost
  doc: update doc for try drain API in vhost lib

Jiayu Hu (1):
  vhost: handle memory hotplug for async vhost

 doc/guides/prog_guide/vhost_lib.rst    |   5 +
 doc/guides/rel_notes/release_21_08.rst |   5 +
 examples/vhost/ioat.c                  |   4 +-
 examples/vhost/ioat.h                  |   4 +-
 examples/vhost/main.c                  |  48 +++++++-
 examples/vhost/main.h                  |   1 +
 lib/vhost/rte_vhost_async.h            |  28 ++++-
 lib/vhost/version.map                  |   3 +
 lib/vhost/vhost_user.c                 |   9 ++
 lib/vhost/virtio_net.c                 | 146 ++++++++++++++++++++-----
 10 files changed, 215 insertions(+), 38 deletions(-)

--
2.29.2