x86: reduce memory and intra-node effects

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 6 insertions, 2 deletions

diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index bccbdc7be434..e5a1ec8342dc 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -346,8 +346,12 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
         /* First clean up the node list */
         for (i = 0; i < MAX_NUMNODES; i++) {
                 cutoff_node(i, start, end);
-                /* ZZZ why was this needed. At least add a comment */
-                if (nodes[i].end && (nodes[i].end - nodes[i].start) < NODE_MIN_SIZE) {
+                /*
+                 * don't confuse VM with a node that doesn't have the
+                 * minimum memory.
+                 */
+                if (nodes[i].end &&
+                        (nodes[i].end - nodes[i].start) < NODE_MIN_SIZE) {
                         unparse_node(i);
                         node_set_offline(i);
                 }