The RDMA QIOChannel does not support bi-directional communication, so when RDMA
live migration with postcopy enabled, the source qemu return path get qemu file
error.
These patches implement bi-directional communication for RDMA QIOChannel and
disable the RDMA WRITE during the postcopy phase.
This patch just make postcopy works, and will improve performance later.
[v4]
- not wait RDMA_CM_EVENT_DISCONNECTED event after rdma_disconnect
- implement io_set_aio_fd_handler function for RDMA QIOChannel (Juan Quintela)
- invoke qio_channel_yield only when qemu_in_coroutine() (Juan Quintela)
- create a dedicated thread to release rdma resource
- poll the cm event while wait RDMA work request completion
- implement the shutdown function for RDMA QIOChannel
[v3]
- add a mutex in QEMUFile struct to avoid concurrent channel close (Daniel)
- destroy the mutex before free QEMUFile (David)
- use rdmain and rmdaout instead of rdma->return_path (Daniel)
[v2]
- does not update bytes_xfer when disable RDMA WRITE (David)
- implement bi-directional communication for RDMA QIOChannel (Daniel)
Lidong Chen (12):
migration: disable RDMA WRITE after postcopy started
migration: create a dedicated connection for rdma return path
migration: remove unnecessary variables len in QIOChannelRDMA
migration: avoid concurrent invoke channel_close by different threads
migration: implement bi-directional RDMA QIOChannel
migration: Stop rdma yielding during incoming postcopy
migration: not wait RDMA_CM_EVENT_DISCONNECTED event after
rdma_disconnect
migration: implement io_set_aio_fd_handler function for RDMA
QIOChannel
migration: invoke qio_channel_yield only when qemu_in_coroutine()
migration: create a dedicated thread to release rdma resource
migration: poll the cm event while wait RDMA work request completion
migration: implement the shutdown for RDMA QIOChannel
migration/colo.c | 2 +
migration/migration.c | 2 +
migration/postcopy-ram.c | 2 +
migration/qemu-file-channel.c | 12 +-
migration/qemu-file.c | 13 +-
migration/ram.c | 4 +
migration/rdma.c | 435 ++++++++++++++++++++++++++++++++++++------
migration/savevm.c | 3 +
migration/trace-events | 1 -
9 files changed, 411 insertions(+), 63 deletions(-)
--
1.8.3.1
