[PULL 00/27] migration queue

[Dr. David Alan Gilbert (git)]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

The following changes since commit 1ba089f2255bfdb071be3ce6ac6c3069e8012179:

  Merge remote-tracking branch 'remotes/armbru/tags/pull-qmp-2021-02-04' into 
staging (2021-02-04 14:15:35 +0000)

are available in the Git repository at:

  git://github.com/dagrh/qemu.git tags/pull-migration-20210204a

for you to fetch changes up to ef74d46576a9e5aff96f285b74150f341a525688:

  migration: introduce snapshot-{save, load, delete} QMP commands (2021-02-04 
16:29:03 +0000)

----------------------------------------------------------------
Migration pull 2020-02-04

 New snapshot features:
   a) Andrey's RAM snapshot feature using userfault-wp
   b) Dan's native-QMP snapshots

Cleanups:
   c) Jinhao's memory leeak fixes
   d) Wainer's maybe unitialized fix
   e) Markus's parameter fixes

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

----------------------------------------------------------------
Andrey Gruzdev (5):
      migration: introduce 'background-snapshot' migration capability
      migration: introduce UFFD-WP low-level interface helpers
      migration: support UFFD write fault processing in ram_save_iterate()
      migration: implementation of background snapshot thread
      migration: introduce 'userfaultfd-wrlat.py' script

Daniel P. Berrangé (11):
      block: push error reporting into bdrv_all_*_snapshot functions
      migration: stop returning errno from load_snapshot()
      block: add ability to specify list of blockdevs during snapshot
      block: allow specifying name of block device for vmstate storage
      block: rename and alter bdrv_all_find_snapshot semantics
      migration: control whether snapshots are ovewritten
      migration: wire up support for snapshot device selection
      migration: introduce a delete_snapshot wrapper
      iotests: add support for capturing and matching QMP events
      iotests: fix loading of common.config from tests/ subdir
      migration: introduce snapshot-{save, load, delete} QMP commands

Dr. David Alan Gilbert (2):
      migration: Add blocker information
      migration: Display the migration blockers

Jinhao Gao (3):
      spapr_pci: Fix memory leak of vmstate_spapr_pci
      savevm: Fix memory leak of vmstate_configuration
      vmstate: Fix memory leak in vmstate_handle_alloc()

Markus Armbruster (4):
      migration: Fix migrate-set-parameters argument validation
      migration: Clean up signed vs. unsigned XBZRLE cache-size
      migration: Fix cache_init()'s "Failed to allocate" error messages
      migration: Fix a few absurdly defective error messages

Philippe Mathieu-Daudé (1):
      migration: Make save_snapshot() return bool, not 0/-1

Wainer dos Santos Moschetta (1):
      migration/qemu-file: Fix maybe uninitialized on qemu_get_buffer_in_place()

 block/monitor/block-hmp-cmds.c |   7 +-
 block/snapshot.c               | 256 ++++++++++++++++++--------
 hw/ppc/spapr_pci.c             |  11 ++
 include/block/snapshot.h       |  23 ++-
 include/exec/memory.h          |   8 +
 include/migration/snapshot.h   |  47 ++++-
 include/qemu/userfaultfd.h     |  35 ++++
 migration/migration.c          | 409 +++++++++++++++++++++++++++++++++++++++--
 migration/migration.h          |   6 +-
 migration/page_cache.c         |   8 +-
 migration/page_cache.h         |   2 +-
 migration/qemu-file.c          |   2 +-
 migration/ram.c                | 305 +++++++++++++++++++++++++++++-
 migration/ram.h                |   8 +-
 migration/savevm.c             | 341 +++++++++++++++++++++++++++++-----
 migration/savevm.h             |   3 +
 migration/trace-events         |   2 +
 migration/vmstate.c            |   1 +
 monitor/hmp-cmds.c             |  45 +++--
 qapi/job.json                  |   9 +-
 qapi/migration.json            | 218 ++++++++++++++++++++--
 replay/replay-debugging.c      |  12 +-
 replay/replay-snapshot.c       |   5 +-
 scripts/userfaultfd-wrlat.py   | 122 ++++++++++++
 softmmu/vl.c                   |   2 +-
 tests/qemu-iotests/267.out     |  12 +-
 tests/qemu-iotests/common.qemu | 106 ++++++++++-
 tests/qemu-iotests/common.rc   |  10 +-
 util/meson.build               |   1 +
 util/trace-events              |   9 +
 util/userfaultfd.c             | 345 ++++++++++++++++++++++++++++++++++
 31 files changed, 2145 insertions(+), 225 deletions(-)
 create mode 100644 include/qemu/userfaultfd.h
 create mode 100755 scripts/userfaultfd-wrlat.py
 create mode 100644 util/userfaultfd.c