[Qemu-devel] [PATCH v3 00/29] postcopy+vhost-user/shared ram

[Dr. David Alan Gilbert (git)]

From: "Dr. David Alan Gilbert" <address@hidden>

Hi,
  This is the first non-RFC version of this patch set that
enables postcopy migration with shared memory to a vhost user process.
It's based off current head.

I've tested with vhost-user-bridge and a modified dpdk; both very
lightly.

Compared to v2 we're now using the just-merged reworks to the vhost
code (suggested by Igor), so that the huge page region merging is now a lot 
simpler
in this series. The handshake between the client and the qemu for the
set-mem-table is now a bit more complex to resolve a previous race where
the client would start sending requests to the qemu prior to the qemu
being ready to accept them.

Dave

Dr. David Alan Gilbert (29):
  migrate: Update ram_block_discard_range for shared
  qemu_ram_block_host_offset
  postcopy: use UFFDIO_ZEROPAGE only when available
  postcopy: Add notifier chain
  postcopy: Add vhost-user flag for postcopy and check it
  vhost-user: Add 'VHOST_USER_POSTCOPY_ADVISE' message
  libvhost-user: Support sending fds back to qemu
  libvhost-user: Open userfaultfd
  postcopy: Allow registering of fd handler
  vhost+postcopy: Register shared ufd with postcopy
  vhost+postcopy: Transmit 'listen' to client
  postcopy+vhost-user: Split set_mem_table for postcopy
  migration/ram: ramblock_recv_bitmap_test_byte_offset
  libvhost-user+postcopy: Register new regions with the ufd
  vhost+postcopy: Send address back to qemu
  vhost+postcopy: Stash RAMBlock and offset
  vhost+postcopy: Send requests to source for shared pages
  vhost+postcopy: Resolve client address
  postcopy: wake shared
  postcopy: postcopy_notify_shared_wake
  vhost+postcopy: Add vhost waker
  vhost+postcopy: Call wakeups
  libvhost-user: mprotect & madvises for postcopy
  vhost-user: Add VHOST_USER_POSTCOPY_END message
  vhost+postcopy: Wire up POSTCOPY_END notify
  vhost: Huge page align and merge
  postcopy: Allow shared memory
  libvhost-user: Claim support for postcopy
  postcopy shared docs

 contrib/libvhost-user/libvhost-user.c | 303 ++++++++++++++++++++++++-
 contrib/libvhost-user/libvhost-user.h |   8 +
 docs/devel/migration.rst              |  41 ++++
 docs/interop/vhost-user.txt           |  42 ++++
 exec.c                                |  85 +++++--
 hw/virtio/trace-events                |  16 +-
 hw/virtio/vhost-user.c                | 411 +++++++++++++++++++++++++++++++++-
 hw/virtio/vhost.c                     |  66 +++++-
 include/exec/cpu-common.h             |   4 +
 migration/migration.c                 |   6 +
 migration/migration.h                 |   4 +
 migration/postcopy-ram.c              | 350 +++++++++++++++++++++++------
 migration/postcopy-ram.h              |  69 ++++++
 migration/ram.c                       |   5 +
 migration/ram.h                       |   1 +
 migration/savevm.c                    |  13 ++
 migration/trace-events                |   6 +
 trace-events                          |   3 +-
 vl.c                                  |   2 +
 19 files changed, 1337 insertions(+), 98 deletions(-)

-- 
2.14.3