[v2] Add support for fixed ram offsets during migration

[PATCH v2 00/11] Add support for fixed ram offsets during migration

Nikolay Borisov posted 11 patches 1 year, 6 months ago

Diff against v1
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Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20221010133408.3214433-1-nborisov@suse.com

Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Peter Xu <peterx@redhat.com>, David Hildenbrand <david@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, "Daniel P. Berrangé" <berrange@redhat.com>, Juan Quintela <quintela@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Eric Blake <eblake@redhat.com>, Markus Armbruster <armbru@redhat.com>, John Snow <jsnow@redhat.com>, Cleber Rosa <crosa@redhat.com>

include/exec/ramblock.h             |   7 +
include/io/channel-file.h           |  10 +
include/io/channel.h                |   1 +
include/migration/qemu-file-types.h |   2 +
io/channel-file.c                   |  55 +++++
migration/file.c                    |  38 ++++
migration/file.h                    |  10 +
migration/meson.build               |   1 +
migration/migration.c               |  61 +++++-
migration/migration.h               |   6 +
migration/qemu-file.c               |  82 +++++++
migration/qemu-file.h               |   4 +
migration/ram.c                     | 328 +++++++++++++++++++++-------
migration/savevm.c                  |  39 ++--
qapi/migration.json                 |   2 +-
scripts/analyze-migration.py        |  49 ++++-
16 files changed, 594 insertions(+), 101 deletions(-)
create mode 100644 migration/file.c
create mode 100644 migration/file.h

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[PATCH v2 00/11] Add support for fixed ram offsets during migration

Posted by Nikolay Borisov 1 year, 6 months ago

Here's a slightly updated version of the patchset. In its core it remains
however I have addressed a couple of issue, namely :

* Don't initialize the shadow bitmap as all set - this was causing the full ram
to be copied always.

* Fixed a memory leak in parse_ramblocks_fixed_ram by making the dirty bitmap
variable an g_autofree one

* Slightly reworked how ram is being copied during restore and now the code is
working in chunks of 4mb (might have to tweak this?)

For a more general overview of what this series is all about refer to the
initial posting [0].

[0] https://lore.kernel.org/qemu-devel/20221004123733.2745519-1-nborisov@suse.com/

Nikolay Borisov (11):
  migration: support file: uri for source migration
  migration: Add support for 'file:' uri for incoming migration
  migration: Make migration json writer part of MigrationState struct
  io: add pwritev support to QIOChannelFile
  io: Add support for seekable channels
  io: Add preadv support to QIOChannelFile
  migration: add qemu_get_buffer_at
  migration/ram: Introduce 'fixed-ram' migration stream capability
  migration: Refactor precopy ram loading code
  migration: Add support for 'fixed-ram' migration restore
  analyze-migration.py: add initial support for fixed ram streams

 include/exec/ramblock.h             |   7 +
 include/io/channel-file.h           |  10 +
 include/io/channel.h                |   1 +
 include/migration/qemu-file-types.h |   2 +
 io/channel-file.c                   |  55 +++++
 migration/file.c                    |  38 ++++
 migration/file.h                    |  10 +
 migration/meson.build               |   1 +
 migration/migration.c               |  61 +++++-
 migration/migration.h               |   6 +
 migration/qemu-file.c               |  82 +++++++
 migration/qemu-file.h               |   4 +
 migration/ram.c                     | 328 +++++++++++++++++++++-------
 migration/savevm.c                  |  39 ++--
 qapi/migration.json                 |   2 +-
 scripts/analyze-migration.py        |  49 ++++-
 16 files changed, 594 insertions(+), 101 deletions(-)
 create mode 100644 migration/file.c
 create mode 100644 migration/file.h

--
2.34.1