[PATCH v2 0/3] dump-guest-memory: Add blocker for migration

[Peter Xu]

v2:
- One more patch: "migration: Make migration blocker work for snapshots too"
- Move register of migration blocker to be before dump_init [Marc-Andre]
- Collected r-bs

Both dump-guest-memory and live migration have vm state cached internally.
Allowing them to happen together means the vm state can be messed up.  Simply
block live migration for dump-guest-memory.

One trivial thing to mention is we should still allow dump-guest-memory even if
-only-migratable is specified, because that flag should majorly be used to
guarantee not adding devices that will block migration by accident.  Dump guest
memory is not like that - it'll only block for the seconds when it's dumping.

Thanks,

Peter Xu (3):
  migration: Make migration blocker work for snapshots too
  migration: Add migrate_add_blocker_internal()
  dump-guest-memory: Block live migration

 dump/dump.c                 | 24 +++++++++++++++++++-----
 include/migration/blocker.h | 16 ++++++++++++++++
 migration/migration.c       | 24 +++++++++++++++---------
 3 files changed, 50 insertions(+), 14 deletions(-)

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2.31.1