Re: [Qemu-devel] [PULL 03/12] migration: Add multifd capability

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

* Juan Quintela (quintela@redhat.com) wrote:
> Signed-off-by: Juan Quintela <quintela@redhat.com>
> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
>  include/migration/migration.h | 1 +
>  migration/migration.c         | 9 +++++++++
>  qapi-schema.json              | 5 +++--
>  3 files changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/include/migration/migration.h b/include/migration/migration.h
> index 7528cc2..e8bba55 100644
> --- a/include/migration/migration.h
> +++ b/include/migration/migration.h
> @@ -308,6 +308,7 @@ bool migrate_postcopy_ram(void);
>  bool migrate_zero_blocks(void);
> 
>  bool migrate_auto_converge(void);
> +bool migrate_use_multifd(void);
> 
>  int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen,
>                           uint8_t *dst, int dlen);
> diff --git a/migration/migration.c b/migration/migration.c
> index 2b179c6..37af7a4 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -1369,6 +1369,15 @@ bool migrate_use_events(void)
>      return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS];
>  }
> 
> +bool migrate_use_multifd(void)
> +{
> +    MigrationState *s;
> +
> +    s = migrate_get_current();
> +
> +    return s->enabled_capabilities[MIGRATION_CAPABILITY_X_MULTIFD];
> +}
> +
>  int migrate_use_xbzrle(void)
>  {
>      MigrationState *s;
> diff --git a/qapi-schema.json b/qapi-schema.json
> index 61151f3..ff7579e 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -865,12 +865,13 @@
>  #        side, this process is called COarse-Grain LOck Stepping (COLO) for
>  #        Non-stop Service. (since 2.8)
>  #
> +# @x-multifd: Use more than one fd for migration (since 2.9)
> +#
>  # Since: 1.2
>  ##
>  { 'enum': 'MigrationCapability',
>    'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
> -           'compress', 'events', 'postcopy-ram', 'x-colo'] }
> -
> +           'compress', 'events', 'postcopy-ram', 'x-colo', 'x-multifd'] }

That needs a minor remerge after 'release-ram' just went in.

Dave

>  ##
>  # @MigrationCapabilityStatus:
>  #
> -- 
> 2.7.4
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK