Can the dirtiness of pages of a mmap be found from userspace?

Question

Can dirtiness of pages of a (non-shared) mmap be accessed from userspace under linux 2.6.30+? Platform-specific hacks and kludges welcome.

Ideally, I\'m looking for

Answer 1

The traditional solution is to mprotect to read only, and then handle the sigsegv and mark dirty before reprotecting to allow writes. We did this at ObjectStore a long time ago for this very purpose.