Re: Removing an executable while it runs

[Jeff Dike]

[e-mail] said:
> mlockall() only locks those pages that are **currently** paged in, or
> optionally those that will be paged in in the future. Unless you have
> a way to make sure that all pages of the binary are actually in memory
> before you call mlockall(), this gains you nothing.

No, mlockall will page in the entire process before returning if you ask it to.

See this snippet in mlock_fixup:

		if (newflags & VM_LOCKED) {
			pages = -pages;
			make_pages_present(start, end);
		}

VM_LOCKED comes in through the mlockall system call.

				Jeff