Liang Li <liang.z...@intel.com> wrote: > Because of the patch 3ea3b7fa9af067982f34b of kvm, which introduces a > lazy collapsing of small sptes into large sptes mechanism, now > migration_end() is a time consuming operation because it calls > memroy_global_dirty_log_stop(), which will trigger the dropping of small > sptes operation and takes about dozens of milliseconds, so call > migration_end() before all the vmsate data has already been transferred > to the destination will prolong VM downtime. This operation should be > deferred after all the data has been transferred to the destination. > > blk_mig_cleanup() can be deferred too. > > For a VM with 8G RAM, this patch can reduce the VM downtime about 30 ms. > > Signed-off-by: Liang Li <liang.z...@intel.com> > Reviewed-by: Paolo Bonzini <pbonz...@redhat.com>
Reviewed-by: Juan Quintela <quint...@redhat.com> And the naming makes more sense even, thanks
