Based on top of my next branch.
- Rebased on top of latest upstream
- Redo a lot of the packet accounting
  still not completely perfect, but much better than what is upstream

Still working continuing on that.

Please review.

[v2]
- rebased on top of latest upstream
- lots of minor fixes
- start support for atomic counters
  * we need to move ram_limit_used/max to migration.c
  * that means fixing rdma.c
  * and test-vmstate.

So I am donig that right now.

Juan Quintela (11):
  migration: Update atomic stats out of the mutex
  migration: Make multifd_bytes atomic
  multifd: We already account for this packet on the multifd thread
  multifd: Count the number of bytes sent correctly
  migration: Make ram_save_target_page() a pointer
  multifd: Make flags field thread local
  multifd: Prepare to send a packet without the mutex held
  multifd: Add capability to enable/disable zero_page
  multifd: Support for zero pages transmission
  multifd: Zero pages transmission
  So we use multifd to transmit zero pages.

 qapi/migration.json    |   8 ++-
 migration/migration.h  |   1 +
 migration/multifd.h    |  36 ++++++++++--
 migration/ram.h        |   1 +
 hw/core/machine.c      |   1 +
 migration/migration.c  |  16 +++++-
 migration/multifd.c    | 123 +++++++++++++++++++++++++++++++----------
 migration/ram.c        |  51 +++++++++++++++--
 migration/trace-events |   8 +--
 9 files changed, 197 insertions(+), 48 deletions(-)

-- 
2.39.1