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.

Thanks,

-- 
 ml.