Re: the new VMt

Benjamin C.R. LaHaise
2000-09-25T20:47:21Z

On Mon, 25 Sep 2000 yodaiken@fsmlabs.com wrote:

> On Mon, Sep 25, 2000 at 09:23:48PM +0100, Alan Cox wrote:
> > > my prediction is that if you show me an example of
> > > DoS vulnerability, I can show you fix that does not require bean counting.
> > > Am I wrong?
> >
> > I think so. Page tables are a good example
>
> I'm not too sure of what you have in mind, but if it is
> "process creates vast virtual space to generate many page table
> entries -- using mmap"
> the answer is, virtual address space quotas and mmap should kill
> the process on low mem for page tables.

No. Page tables are not freed after munmap (and for good reason). The
counting of page table "beans" is critical.

-ben