3 ms·

This is why msync is for. You can sync page by page and ensure ordering yourself.

• drfuchs 9y ago
  You think you can, but you can't! Linux always sync's the whole file; see https://lwn.net/Articles/502612/ https://lwn.net/Articles/502612/ for a discussion of why fixing this horrible bug is too dangerous.
  • mcguire 9y ago
    "You think you can, but you can't!" Welcome to systems programming....
  • neoflame 9y ago
    This is not true after Linux 3.16, commit 7fc34a62ca44 ("mm/msync.c: sync only the requested range in msync()").