I can think of an efficiency-related use for MAP_COPY, and it has
nothing to do with shared libraries:
- An editor using mmap() to read a file.
The existing semantics require that you either call read() and waste
(potentially shared) memory to do this, or use MAP_PRIVATE and then
deliberately page in and dirty all of the file's pages.
Neither of these seem to be the most efficient way to launch an editor.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to firstname.lastname@example.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/