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migration: introduce postcopy-blocktime capability

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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>
This commit is contained in:
Alexey Perevalov 2017-10-30 16:16:25 +03:00 • committed by Juan Quintela
parent 029ff892e1
commit 31bf06a9d6
3 changed files with 15 additions and 1 deletions
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9
migration/migration.c
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@ -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;