Il 17/09/2013 19:07, Michael S. Tsirkin ha scritto: > After memory_region_del_subregion returns, > it's a promise that there will not be accesses > to the region.
It's racy anyway. You can have memory_region_del_subregion happen one clock cycle after the other (physical) CPU has done checked that there will not be accesses to the region. A real bus has a "big PCI lock" (there can be only one transaction at a time), which is exactly what we want to get rid of. > So I'm not even sure we really need to move destroy to finalize anymore ... We definitely need to move it. Even if we added a flag that we set in memory_region_del_subregion, we need to check it later when AIO completes. Paolo
