On 25.01.22 13:09, William Kucharski wrote: > I would think this should be the case; certainly it seems to be a more effective approach than having to manually enable sharing via the API in every case or via changes to ld.so. > > If anything it might be useful to have an API for shutting it off, though there are already multiple areas where the system shares resources in ways that cannot be shut off by user action. > I don't have time to look into details right now, but I see various possible hard-to-handle issues with sharing anon pages via this mechanism between processes. If we could restrict it to MAP_SHARED and have some magic toggle to opt in, that would be great. Features like uffd that we might soon see on some MAP_SHARED pages will require to not share page tables automatically I assume. -- Thanks, David / dhildenb
