Re: [rfc] [patch] mm: zone_reclaim fix for pseudo file systems

Andrew Morton
2007-07-31T19:46:42Z

On Tue, 31 Jul 2007 12:35:03 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> On Mon, 30 Jul 2007, Andrew Morton wrote:
>
> > On Mon, 30 Jul 2007 23:09:09 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:
> >
> > > > OK, plausible. But where's the *proof*? We probably already have
> > > > sufficient statistics to be able to prove this.
> > >
> > > Rik has shown this repeatedly.
> >
> > url?
>
> F.e.
>
> http://linux-mm.org/ProblemWorkloads
>
> http://lwn.net/Articles/224850/

They're different from Kiran's problem. Not specifically ramfs and
zone-reclaim isn't (obviously) involved. Yes, the solution is probably the
same one, but it'd be sad to "fix" Kiran's problem via finer-grained zone
accounting while leaving an undiscovered bug behind.

If we're going further down that path we should aim at removing the
all_unreclaimable logic completely.