Linus Torvalds <torvalds@osdl.org> writes:

quoted text
> It does actually end up forcing the kernel to do more work (it's harder to 
> re-use a mapped page than it is to reuse one that isn't), and in that 
> sense, if you have less than <n> GB of RAM and can't just keep it all in 
> memory at the same time, doing one large mmap is possibly more expensive 
> than chunking things up.

Even if it is a read-only private mapping?  Would MAP_SHARED
help?


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