https://mmaps.net/
mmaps.net — Multi-Map Online
Multi-map online: OpenStreetMap, Yandex, ArcGIS ESRI, OpenTopoMap and more on one screen. Compare maps, load GPX/KML tracks, offline tile cache.
multimaponline
https://lwn.net/Articles/353240/
[PATCH 0/7] Improve VFS to handle better mmaps when blocksize pagesize (v3) [LWN.net]
https://sourceware.org/pipermail/cygwin-patches/2003q1/003398.html
NT 4.0 fixup_mmaps_after_fork() patch
ntfixupforkpatch
https://cygwin.com/pipermail/cygwin/2002-September/083361.html
IPC & fixup_mmaps_after_fork
ipcfixupfork