[PATCH 0/5] migration/multifd: Prerequisite cleanups for ongoing work

[Fabiano Rosas]

Hi,

Here are two cleanups that are prerequiste for the fixed-ram work, but
also affect the other series on the list at the moment, so I want to
make sure it works for everyone:

1) Separate multifd_ops from compression. The multifd_ops are
   currently coupled with the multifd_compression parameter.

We're adding new multifd_ops in the fixed-ram work and adding new
compression ops in the compression work.

2) Add a new send hook. The multifd_send_thread code currently does
   some twists to support zero copy, which is a socket-only feature.

This might affect the zero page and DSA work which add code to
multifd_send_thread.

CI run: https://gitlab.com/farosas/qemu/-/pipelines/1154332360

(I also tested zero copy locally. We cannot add a test for it because
it needs root due to memory locking limits)

Fabiano Rosas (5):
  migration/multifd: Separate compression ops from non-compression
  migration/multifd: Move multifd_socket_ops to socket.c
  migration/multifd: Add multifd_ops->send
  migration/multifd: Simplify zero copy send
  migration/multifd: Move zero copy flag into multifd_socket_setup

 migration/multifd-zlib.c |   9 ++-
 migration/multifd-zstd.c |   9 ++-
 migration/multifd.c      | 164 +++++----------------------------------
 migration/multifd.h      |   6 +-
 migration/socket.c       |  90 ++++++++++++++++++++-
 5 files changed, 128 insertions(+), 150 deletions(-)

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2.35.3