Re: 2.6.20 instability

[Manuel L. <ma...@ro...>]

Hi Paul,
 
> On Mon, Jan 29, 2007 at 06:40:24PM +0900, Paul Mundt wrote:
> > We switched the lazy dcache writeback model to PG_dcache_dirty, which
> > results in measurably less flushing. Unfortunately it seems like there
> > are still some explicit flushes required that aren't being handled.
> > 
> > My boards do not frequently exhibit this behaviour however, so it's slow
> > debugging. If you want a quick fix, you can either revert to PG_mapped
> > behaviour, or insert a dummy flush for the faulting page's dcache lines
> > in update_mmu_cache().
> 
> With commit 0ca6a188.. ("Lazy dcache writeback optimizations") applied
> it seems pretty stable. I'll let it run overnight and see where
> it fails.

Compiled a few large packages overnight, and none failed.
If there is still a chance, can the aforementioned patch go into
final 2.6.20? Otherwise SH is almost unusable.

Thanks,

-- 
 ml.