Re: VM in 2.4.7-pre hurts...

Mike Galbraith
2001-07-09T09:39:48Z

On 9 Jul 2001, Christoph Rohland wrote:

> Hi Mike,
>
> On Mon, 9 Jul 2001, Mike Galbraith wrote:
> > --- mm/shmem.c.org Mon Jul 9 09:03:27 2001
> > +++ mm/shmem.c Mon Jul 9 09:03:46 2001
> > @@ -264,8 +264,8 @@
> > info->swapped++;
> >
> > spin_unlock(&info->lock);
> > -out:
> > set_page_dirty(page);
> > +out:
> > UnlockPage(page);
> > return error;
> > }
> >
> > So, did I fix it or just bust it in a convenient manner ;-)
>
> ... now you drop random pages. This of course helps reducing memory
> pressure ;-)

(shoot. I figured that was too easy to be right)

> But still this may be a hint. You are not running out of swap, aren't
> you?

I'm running oom whether I have swap enabled or not. The inactive
dirty list starts growing forever, until it's full of (aparantly)
dirty pages and I'm utterly oom.

With swap enabled, I keep allocating until there's nothing left.
Actual space usage is roughly 30mb (of 256mb), but when you can't
allocate anymore you're toast too, with the same dirt buildup.

-Mike