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SubjectRe: Hugepages demand paging V1 [4/4]: Numa patch
On Fri, 22 Oct 2004, William Lee Irwin III wrote:

> On Thu, Oct 21, 2004 at 09:58:54PM -0700, Christoph Lameter wrote:
> > Changelog
> > * NUMA enhancements (rough first implementation)
> > * Do not begin search for huge page memory at the first node
> > but start at the current node and then search previous and
> > the following nodes for memory.
> > Signed-off-by: Christoph Lameter <clameter@sgi.com>
>
> dequeue_huge_page() seems to want a nodemask, not a vma, though I
> suppose it's not particularly pressing.

How about this variation following __alloc_page:

Index: linux-2.6.9/mm/hugetlb.c
===================================================================
--- linux-2.6.9.orig/mm/hugetlb.c 2004-10-21 20:39:50.000000000 -0700
+++ linux-2.6.9/mm/hugetlb.c 2004-10-22 10:53:18.000000000 -0700
@@ -32,14 +32,17 @@
{
int nid = numa_node_id();
struct page *page = NULL;
-
- if (list_empty(&hugepage_freelists[nid])) {
- for (nid = 0; nid < MAX_NUMNODES; ++nid)
- if (!list_empty(&hugepage_freelists[nid]))
- break;
+ struct zonelist *zonelist = NODE_DATA(nid)->node_zonelists;
+ struct zone **zones = zonelist->zones;
+ struct zone *z;
+ int i;
+
+ for(i=0; (z = zones[i])!= NULL; i++) {
+ nid = z->zone_pgdat->node_id;
+ if (list_empty(&hugepage_freelists[node_id]))
+ break;
}
- if (nid >= 0 && nid < MAX_NUMNODES &&
- !list_empty(&hugepage_freelists[nid])) {
+ if (z) {
page = list_entry(hugepage_freelists[nid].next,
struct page, lru);
list_del(&page->lru);
-
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