Re: Process Aggregates: module based support for jobs

From: Chris Wedgwood (
Date: Sat Jun 17 2000 - 18:22:36 EST

On Fri, Jun 16, 2000 at 03:21:19PM -0500, Sam Watters wrote:

    1. How to handle the counting of shared memory pages. This has been an
    extremely difficult problem on IRIX to get right - in fact, it is still not done
    2. How the counting of resources impacts the performance of the kernel.
    3. How to handle resource limits in the context of "cluster" jobs.

4. Socket & pipe buffer charging.

Right now, a really good local DoS attack to to create lots of pipes
or better still sockets and push data into them (without reading it),
pretty trivially you eat massive amounts of non-swappable memory.

(I have code that does this if anyone wants).


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