Re: [Bug] mlockall() not working properly in 2.6.x

[Alan Cox]

On Llu, 2005-12-19 at 18:27 +0100, Jan-Benedict Glaw wrote:
> > > that we did this because inheriting MCL_FUTURE is standards-incorrect.
> > 
> > Oh! So how can I make programs unswappable with kernel 2.6.x then?
> 
> That would mean that you cannot just exec() another program that will
> also be mlockall()ed. The new program has to do that on its own...

mlockall MCL_FUTURE applies to this image only and the 2.6 behaviour is
correct if less useful in some ways. It would be possible to add an
inheriting MCL_ flag that was Linux specific but then how do you control
the depth of inheritance ? If that isn't an issue it looks the easiest.

Another possibility would be pmlockall(pid, flag), but that looks even
more nasty if it races an exec.

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