Re: 2.4.10 VM: what avoids from having lots of unwriteable inactive pages

From: Rik van Riel (
Date: Tue Sep 25 2001 - 11:13:37 EST

On Tue, 25 Sep 2001, Linus Torvalds wrote:
> On Tue, 25 Sep 2001, Rik van Riel wrote:
> > >
> > > swap_out() will deactivate everything it finds to be not-recently used,
> > > and that's how the inactive list ends up getting replenished.
> >
> > mlock()
> Hey, if you've mlock'ed more than your available memory, there's nothing
> the VM layer can do. Except maybe a nice printk("Kiss your *ss goodbye");

But if you've mlock()ed enough to clog up the inactive
list, the VM could just move the pages it cannot free
back to the active list and it will come across those
pages which are freeable eventually.

Note that the maximum amount of mlock()ed memory is way
higher than the maximum amount of pages the system puts
on the inactive list.

(at least, it was last I looked at the maximum number
of mlocked pages)



IA64: a worthy successor to the i860.

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This archive was generated by hypermail 2b29 : Sun Sep 30 2001 - 21:00:31 EST