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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>
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@ -1499,6 +1499,15 @@ bool migrate_zero_blocks(void)
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return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS];
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}
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bool migrate_postcopy_blocktime(void)
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{
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MigrationState *s;
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s = migrate_get_current();
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return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME];
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}
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bool migrate_use_compression(void)
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{
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MigrationState *s;
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@ -201,6 +201,7 @@ int migrate_compress_level(void);
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int migrate_compress_threads(void);
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int migrate_decompress_threads(void);
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bool migrate_use_events(void);
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bool migrate_postcopy_blocktime(void);
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/* Sending on the return path - generic and then for each message type */
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void migrate_send_rp_shut(MigrationIncomingState *mis,
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@ -352,12 +352,16 @@
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#
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# @x-multifd: Use more than one fd for migration (since 2.11)
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#
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# @postcopy-blocktime: Calculate downtime for postcopy live migration
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# (since 2.12)
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#
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# Since: 1.2
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##
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{ 'enum': 'MigrationCapability',
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'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
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'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram',
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'block', 'return-path', 'pause-before-switchover', 'x-multifd' ] }
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'block', 'return-path', 'pause-before-switchover', 'x-multifd',
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'postcopy-blocktime' ] }
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##
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# @MigrationCapabilityStatus:
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