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

Russell King
2007-07-14T17:16:26Z

On Sat, Jul 14, 2007 at 08:10:49AM -0700, Christoph Lameter wrote:
> On Sat, 14 Jul 2007, Russell King wrote:
>
> > It would also be nice to convert ARM to using sparsemem rather than
> > discontigmem, but despite having a patch adding the supporting common
> > infrastructure for the last year and a half or so, no one in the ARM
> > community is interested in it.
>
> Yeah I was also not interested for the longest time because when I
> became concerned when I looked at the code generated by sparsemem for
> virt_to_page and page_address. But that is different now.
>
> > Since I've no machines which use the present discontig support and
> > have more than a single bank of memory, I've no way to test and
> > progress sparsemem on ARM - and since no one's interested I'm probably
> > going to drop the ARM sparsemem git branch soon.
>
> Could you keep it around for a while longer? sparse_virtual now allows
> code reduction in page_address and virt_to_page even vs. discontig.

The patch is at:

http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/arm:sparsemem.diff

it's not much.

--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/