Messages in this thread |  | | Date | Mon, 25 Sep 2000 15:12:50 -0600 | From | yodaiken@fsmlabs ... | Subject | Re: the new VMt |
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On Mon, Sep 25, 2000 at 04:47:21PM -0400, Benjamin C.R. LaHaise wrote: > 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.
I've seen the assertion before, reasons would be interesting.
-- --------------------------------------------------------- Victor Yodaiken Finite State Machine Labs: The RTLinux Company. www.fsmlabs.com www.rtlinux.com
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