Re: [PATCH 1/4] x86_64: Switch to SPARSE_VIRTUAL

[Christoph Lameter]

On Mon, 2 Apr 2007, Dave Hansen wrote:

> On Mon, 2007-04-02 at 14:28 -0700, Christoph Lameter wrote:
> > I do not care what its called as long as it 
> > covers all the bases and is not a glaring performance regresssion (like 
> > SPARSEMEM so far). 
> 
> I honestly don't doubt that there are regressions, somewhere.  Could you
> elaborate, and perhaps actually show us some numbers on this?  Perhaps
> instead of adding a completely new model, we can adapt the existing ones
> somehow.

Just look at pfn_to_page and friends on ia64 and see what atrocities 
sparsemem does with those if you enable it.
-
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/