1 files changed, 46 insertions, 0 deletions
diff --git a/packages/sys-kernel/linux-image-redcore-lts/files/introduce-NUMA-identity-node-sched-domain.patch b/packages/sys-kernel/linux-image-redcore-lts/files/introduce-NUMA-identity-node-sched-domain.patch
new file mode 100644
index 0000000..2376eda
--- /dev/null
+++ b/packages/sys-kernel/linux-image-redcore-lts/files/introduce-NUMA-identity-node-sched-domain.patch
@@ -0,0 +1,46 @@
+diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
+index 808998fe1..18d3321ef 100644
+--- a/kernel/sched/topology.c
++++ b/kernel/sched/topology.c
+@@ -1339,6 +1339,10 @@ void sched_init_numa(void)
+ 	if (!sched_domains_numa_distance)
+ 		return;
+ 
++	/* Includes NUMA identity node at level 0. */
++	sched_domains_numa_distance[level++] = curr_distance;
++	sched_domains_numa_levels = level;
++
+ 	/*
+ 	 * O(nr_nodes^2) deduplicating selection sort -- in order to find the
+ 	 * unique distances in the node_distance() table.
+@@ -1386,8 +1390,7 @@ void sched_init_numa(void)
+ 		return;
+ 
+ 	/*
+-	 * 'level' contains the number of unique distances, excluding the
+-	 * identity distance node_distance(i,i).
++	 * 'level' contains the number of unique distances
+ 	 *
+ 	 * The sched_domains_numa_distance[] array includes the actual distance
+ 	 * numbers.
+@@ -1448,10 +1451,19 @@ void sched_init_numa(void)
+ 	for (i = 0; sched_domain_topology[i].mask; i++)
+ 		tl[i] = sched_domain_topology[i];
+ 
++	/*
++	 * Add the NUMA identity distance, aka single NODE.
++	 */
++	tl[i++] = (struct sched_domain_topology_level){
++		.mask = sd_numa_mask,
++		.numa_level = 0,
++		SD_INIT_NAME(NODE)
++	};
++
+ 	/*
+ 	 * .. and append 'j' levels of NUMA goodness.
+ 	 */
+-	for (j = 0; j < level; i++, j++) {
++	for (j = 1; j < level; i++, j++) {
+ 		tl[i] = (struct sched_domain_topology_level){
+ 			.mask = sd_numa_mask,
+ 			.sd_flags = cpu_numa_flags,