Re: [PATCH 07/10] mm: count reclaimable pages per BDI

[Peter Zijlstra]

On Sat, 2007-04-21 at 02:55 -0700, Andrew Morton wrote:
> On Fri, 20 Apr 2007 17:52:01 +0200 Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:
> 
> > Count per BDI reclaimable pages; nr_reclaimable = nr_dirty + nr_unstable.
> 
> hm.  Aggregating dirty and unstable at inc/dec time is a bit kludgy.  If
> later on we want to know just "dirty" then we're in trouble.
> 
> I can see the logic behind it though.
> 
> Perhaps one could have separate BDI_DIRTY and BDI_UNSTABLE and treat them
> separately at inc/dec time, but give them the same numerical value, so
> they in fact refer to the same counter.  That's kludgy too.

:-(

I struggled with it too; don't have a ready solution either. I'll do
whatever the consensus agrees upon.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/