On Mon, 8 Jun 2015 20:39:33 -0700 Calvin Owens <[email protected]> wrote:
> Currently, /proc/<pid>/map_files/ is restricted to CAP_SYS_ADMIN, and > is only exposed if CONFIG_CHECKPOINT_RESTORE is set. > > This interface very useful because it allows userspace to stat() > deleted files that are still mapped by some process, which enables a > much quicker and more accurate answer to the question "How much disk > space is being consumed by files that are deleted but still mapped?" > than is currently possible. Why is that information useful? I could perhaps think of some use for "How much disk space is being consumed by files that are deleted but still open", but to count the mmapped-then-unlinked files while excluding the opened-then-unlinked files seems damned peculiar. IOW, this changelog failed to explain the value of the patch. Bad changelog! Please sell it to us. Preferably with real-world use cases. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
