Re: Memory Management - BSD vs Linux
Rogier Wolff (R.E.Wolff@BitWizard.nl)
Mon, 11 Aug 1997 15:05:50 +0200 (MET DST)
Darren Reed wrote:
>
> In some mail I received from Theodore Y. Ts'o, sie wrote
> >
> > [3] Can any of these systems have
> > a) swap files rather than partitions
> > b) dynamically growing swap space?
> > As far as I can make out, the answeris no!
> >
> > Linux can swap to files (multiple files if necessary), and there is a
> > user-mode daemon that can allow you to dyanmically grow swap space (by
> > allocating a new file).
>
> NetBSD has swapfiles and does not require a daemon to be running for more
> to be added. NetBSD has also since moved on from just swap(2) to having
So? That's dumb. Linux implements as much as possible in userspace.
Only things that have a genuine need to be in the kernel go in the
kernel.
> swapctl(2) which supports things like swap files/partitions with different
> priorities and a replacement program for swapon - swapctl(8).
Whatever the program is called, Linux also does prioritized swapping.
Roger.