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migration: add postcopy migration of dirty bitmaps

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Postcopy migration of dirty bitmaps. Only named dirty bitmaps are migrated.

If destination qemu is already containing a dirty bitmap with the same name
as a migrated bitmap (for the same node), then, if their granularities are
the same the migration will be done, otherwise the error will be generated.

If destination qemu doesn't contain such bitmap it will be created.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: 20180313180320.339796-12-vsementsov@virtuozzo.com
[Changed '+' to '*' as per list discussion. --js]
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2018-03-13 15:34:01 -04:00 • committed by John Snow
parent 16b0fd3252
commit b35ebdf076
8 changed files with 775 additions and 0 deletions
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3
include/migration/misc.h
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@ -56,4 +56,7 @@ bool migration_has_failed(MigrationState *);
bool migration_in_postcopy_after_devices(MigrationState *);
void migration_global_dump(Monitor *mon);
/* migration/block-dirty-bitmap.c */
void dirty_bitmap_mig_init(void);
#endif