Re: new MM and shared memory

From: Christoph Rohland (cr@sap.com)
Date: Fri Sep 22 2000 - 04:16:25 EST


Rik van Riel <riel@conectiva.com.br> writes:

> On 19 Sep 2000, Christoph Rohland wrote:
>
> > As stated before the new mm does break shm swapping.
> > Under the ipctst program driving my machine into swap I get the
> > appended console output. After this it locked up.
> >
> > I can make it run longer by giving mem= with less memory.
>
> Since I changed absolutely nothing to the shm_swap()
> functions, I guess this means that sometimes shm_swap()
> is not called by the system even when it should have been.

Yes, apparently shm swapping is very sensible to balancing issues. It
behaves very differently with different patch levels without ever
changing the shm_swap function. We should really work on integrating
it into the page cache...

Greetings
                Christoph

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