Re: [Qemu-devel] [PATCH v2 0/3] migration capability to discard the migrated ram pages

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Pavel Butsykin (pbutsykin@virtuozzo.com) wrote:
> This feature frees the migrated memory on the source during postcopy-ram
> migration. In the second step of postcopy-ram migration when the source vm
> is put on pause we can free unnecessary memory. It will allow, in particular,
> to start relaxing the memory stress on the source host in a load-balancing
> scenario.

Queued.

> 
> Changes from v1:
> - changed name of the interfaces (discard to release)
> - fix make check error
> - add more comments to qemu_iovec_release_ram()
> - rebase on "Postcopy: Hugepage support" (David's patch series)
> - removed ram_discard_page for xbzrle 
> - fix erroneous release memory in complete precopy (tie release-ram to postcopy)
> 
> Pavel Butsykin (3):
>   migration: add MigrationState arg for ram_save_/compressed_/page()
>   add 'release-ram' migrate capability
>   migration: discard non-dirty ram pages after the start of postcopy
> 
>  include/migration/migration.h |  2 ++
>  include/migration/qemu-file.h |  3 ++-
>  migration/migration.c         | 13 ++++++++++
>  migration/qemu-file.c         | 59 ++++++++++++++++++++++++++++++++++++++-----
>  migration/ram.c               | 56 ++++++++++++++++++++++++++++++++++------
>  qapi-schema.json              |  5 +++-
>  6 files changed, 121 insertions(+), 17 deletions(-)
> 
> -- 
> 2.11.0
> 
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK