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> --- migration/migration.c | 9 +++++++++ migration/migration.h | 1 + qapi-schema.json | 5 ++++- 3 files changed, 14 insertions(+), 1 deletion(-) diff --git a/migration/migration.c b/migration/migration.c index 56929dc..f920ddf 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -1233,6 +1233,15 @@ 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 601e4ab..cf4d04e 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -152,6 +152,7 @@ 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-schema.json b/qapi-schema.json index 4b50b65..e906953 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -900,12 +900,15 @@ # offers more flexibility. # (Since 2.10) # +# @postcopy-blocktime: Calculate downtime for postcopy live migration +# (since 2.10) +# # Since: 1.2 ## { 'enum': 'MigrationCapability', 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks', 'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram', - 'block' ] } + 'block', 'postcopy-blocktime'] } ## # @MigrationCapabilityStatus: -- 1.8.3.1