diff options
| author | Alexey Perevalov <a.perevalov@samsung.com> | 2017-10-30 16:16:25 +0300 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2018-01-15 12:47:59 +0100 |
| commit | 31bf06a9d6844d9977b028bd9b855d53288f979c (patch) | |
| tree | 66fbffbbb9eb0c9f766fd2219f0a98a9542c8fb7 | |
| parent | 029ff892e1049ca4f93f9d8f0059bc02fffd6e32 (diff) | |
| download | qemu-31bf06a9d6844d9977b028bd9b855d53288f979c.zip qemu-31bf06a9d6844d9977b028bd9b855d53288f979c.tar.gz qemu-31bf06a9d6844d9977b028bd9b855d53288f979c.tar.bz2 | |
migration: introduce postcopy-blocktime capability
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 <dgilbert@redhat.com>
Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
| -rw-r--r-- | migration/migration.c | 9 | ||||
| -rw-r--r-- | migration/migration.h | 1 | ||||
| -rw-r--r-- | qapi/migration.json | 6 |
3 files changed, 15 insertions, 1 deletions
diff --git a/migration/migration.c b/migration/migration.c index 19917a4..fb876e9 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -1499,6 +1499,15 @@ 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 663415f..9ab8d070 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -201,6 +201,7 @@ 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 4cd3d13..4d8ccdf 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 2.12) +# # 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: |