Hi Kevin & Juan, I found the function bdrv_invalidate_cache_all() in the process_incoming_migration_co() takes more the 10ms when doing live migration with shared storage, which prolong the service down time.
The bdrv_invalidate_cache_all() is needed when doing the live migration with '-b' option. For live migration with share storage, such as nfs, is it still needed? If so, could please tell me why? If not, I think we can do some optimization. Liang
