On Tue, Jan 30, 2024 at 01:20:46PM -0500, Gregory Price wrote:

+	/* Continue allocating from most recent node and adjust the nr_pages */
+	node = me->il_prev;
+	weight = me->il_weight;
+	if (weight && node_isset(node, nodes)) {
+		node_pages = min(rem_pages, weight);
+		nr_allocated = __alloc_pages_bulk(gfp, node, NULL, node_pages,
+						  NULL, page_array);
+		page_array += nr_allocated;
+		total_allocated += nr_allocated;
+		/* if that's all the pages, no need to interleave */
+		if (rem_pages < weight) {
+			/* stay on current node, adjust il_weight */
+			me->il_weight -= rem_pages;
+			return total_allocated;
+		} else if (rem_pages == weight) {
+			/* move to next node / weight */
+			me->il_prev = next_node_in(node, nodes);
+			me->il_weight = get_il_weight(next_node);

Sigh, I managed to miss a small update that killed next_node in favor of
operating directly on il_prev. Can you squash this fix into the patch?
Otherwise I can submit a separate patch.

~Gregory

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 7cd92f4ec0d7..2c1aef8eab70 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c

@@ -2382,7 +2382,7 @@ static unsigned long alloc_pages_bulk_array_weighted_interleave(gfp_t gfp,
        unsigned int weight_total = 0;
        unsigned long rem_pages = nr_pages;
        nodemask_t nodes;
-       int nnodes, node, next_node;
+       int nnodes, node;
        int resume_node = MAX_NUMNODES - 1;
        u8 resume_weight = 0;
        int prev_node;

@@ -2412,7 +2412,7 @@ static unsigned long alloc_pages_bulk_array_weighted_interleave(gfp_t gfp,
                } else if (rem_pages == weight) {
                        /* move to next node / weight */
                        me->il_prev = next_node_in(node, nodes);
-                       me->il_weight = get_il_weight(next_node);
+                       me->il_weight = get_il_weight(me->il_prev);
                        return total_allocated;
                }
                /* Otherwise we adjust remaining pages, continue from there */