Re: Removing an executable while it runs

[Eric-Olivier Lamey <eric.olivier.lamey@savoirfairelinux.com>]

On Wed, Dec 05, 2001 at 07:25, Jeff Dike wrote:
> twalberg@mindspring.com 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

  Well, according to the man page, mister Walberg is right. How can I
  force mlockall to page in the entire process ? And if it is possible,
  I guess it won't resolve my problem since it is the filesystem which
  refuses to release the blocks, right ?
  To be more precise, here is my situation: the executable file is
  located on a ramfs filesystem. Once it is started, I would like to get
  the space back so that the RAM can be used. Is there a clean solution ?

  P.S: on behalf of Cyrille (who made the first post), I would like to
  thank you for your answers, it is greatly appreciated.

  P.P.S: is it required to include the people involved in the thread in
  the Cc: field ? I have looked in the mailing list FAQ and have not
  found the reason.

-- 
Eric-Olivier Lamey