Re: [PATCH 0/7] Sparsemem Virtual Memmap V5

Christoph Lameter
2007-07-13T17:04:45Z

On Fri, 13 Jul 2007, Andy Whitcroft wrote:

> Andrew, please consider for -mm.
>
> Note that I am away from my keyboard all of next week, but I figured
> it better to get this out for testing.

Yes grumble. Why does it take so long...

Would it be possible to merge this for 2.6.23 (maybe late?). This has been
around for 6 months now. It removes the troubling lookups in
virt_to_page and page_address in sparsemem that have spooked many of us.

virt_to_page efficiency is a performance issue for kfree and
kmem_cache_free in the slab allocators. I inserted probles and saw
that the patchset cuts down the cycles spend in virt_to_page by 50%.