On 30.07.19 21:06, Paolo Bonzini wrote: > On 30/07/19 16:57, Christian Borntraeger wrote: >> While this fixes the test (and the migration does work fine), it still >> means that s390x overindicates the dirty bit for sparsely populated >> 1M segments. It is just a performance issue, but maybe we should try >> to get this fixed. Not sure what to do here to remember us about this, >> adding this as expected fail? > > if it's only on the first access after enabling dirty logging, that > shouldn't be that bad? No its not bad, but certainly something to improve if time allows.