| Date | Sat, 23 Feb 2008 00:05:57 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 08/28] mm: system wide ALLOC_NO_WATERMARK |
| |
On Wed, 20 Feb 2008 15:46:18 +0100 Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> Change ALLOC_NO_WATERMARK page allocation such that the reserves are system > wide - which they are per setup_per_zone_pages_min(), when we scrape the > barrel, do it properly. >
The changelog is fairly incomprehensible.
> mm/page_alloc.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > Index: linux-2.6/mm/page_alloc.c > =================================================================== > --- linux-2.6.orig/mm/page_alloc.c > +++ linux-2.6/mm/page_alloc.c > @@ -1552,6 +1552,12 @@ restart: > rebalance: > if (alloc_flags & ALLOC_NO_WATERMARKS) { > nofail_alloc: > + /* > + * break out of mempolicy boundaries > + */ > + zonelist = NODE_DATA(numa_node_id())->node_zonelists + > + gfp_zone(gfp_mask); > + > /* go through the zonelist yet again, ignoring mins */ > page = get_page_from_freelist(gfp_mask, order, zonelist, > ALLOC_NO_WATERMARKS);
As is the patch. People who care about mempolicies will want a better explanation, please, so they can check that we're not busting their stuff.
|