Alexey Perevalov <a.pereva...@samsung.com> wrote:
> Right now it could be used on destination side to
> enable vCPU blocktime calculation for postcopy live migration.
> vCPU blocktime - it's time since vCPU thread was put into
> interruptible sleep, till memory page was copied and thread awake.
>
> Reviewed-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
> Signed-off-by: Alexey Perevalov <a.pereva...@samsung.com>
Reviewed-by: Juan Quintela <quint...@redhat.com>
> ---
> migration/migration.c | 9 +++++++++
> migration/migration.h | 1 +
> qapi/migration.json | 6 +++++-
> 3 files changed, 15 insertions(+), 1 deletion(-)
>
> diff --git a/migration/migration.c b/migration/migration.c
> index 62761d5..c5244ae 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -1492,6 +1492,15 @@ bool migrate_zero_blocks(void)
> return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS];
> }
>
> +bool migrate_postcopy_blocktime(void)
> +{
> + MigrationState *s;
> +
> + s = migrate_get_current();
> +
> + return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME];
> +}
> +
> bool migrate_use_compression(void)
> {
> MigrationState *s;
> diff --git a/migration/migration.h b/migration/migration.h
> index 8ccdd7a..5f5e527 100644
> --- a/migration/migration.h
> +++ b/migration/migration.h
> @@ -202,6 +202,7 @@ int migrate_compress_level(void);
> int migrate_compress_threads(void);
> int migrate_decompress_threads(void);
> bool migrate_use_events(void);
> +bool migrate_postcopy_blocktime(void);
>
> /* Sending on the return path - generic and then for each message type */
> void migrate_send_rp_shut(MigrationIncomingState *mis,
> diff --git a/qapi/migration.json b/qapi/migration.json
> index 6ae866e..c20caf4 100644
> --- a/qapi/migration.json
> +++ b/qapi/migration.json
> @@ -352,12 +352,16 @@
> #
> # @x-multifd: Use more than one fd for migration (since 2.11)
> #
> +# @postcopy-blocktime: Calculate downtime for postcopy live migration
> +# (since 2.11)
> +#
changed to 2.12
> # Since: 1.2
> ##
> { 'enum': 'MigrationCapability',
> 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
> 'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram',
> - 'block', 'return-path', 'pause-before-switchover', 'x-multifd' ] }
> + 'block', 'return-path', 'pause-before-switchover', 'x-multifd',
> + 'postcopy-blocktime' ] }
>
> ##
> # @MigrationCapabilityStatus:
