MPC831x (and others?) NAND erase performance improvements

[Joakim Tjernlund]

>
> On Mon, 6 Dec 2010 22:15:54 -0500
> Mark Mason <mason at postdiluvian.org> wrote:
>
> > A few months ago I ran into some performance problems involving
> > UBI/NAND erases holding other devices off the LBC on an MPC8315.  I
> > found a solution for this, which worked well, at least with the
> > hardware I was working with.  I suspect the same problem affects other
> > PPCs, probably including multicore devices, and maybe other
> > architectures as well.
> >
> > I don't have experience with similar NAND controllers on other
> > devices, so I'd like to explain what I found and see if someone who's
> > more familiar with the family and/or driver can tell if this is
> > useful.
> >
> > The problem cropped up when there was a lot of traffic to the NAND
> > (Samsung K9WAGU08U1B-PIB0), with the NAND being on the LBC along with
> > a video chip that needed constant and prompt attention.
>
> If you attach NAND to the LBC, you should not attach anything else to
> it which is latency-sensitive.

This "feature" makes the LBC useless to us. Is there some workaround or plan
to address this limitation?

      Jocke