From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/linux/topology.h | 41 +++++++++++++++++++++++------------------
1 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/kernel/include/linux/topology.h b/kernel/include/linux/topology.h
index cb0775e..7634cd7 100644
--- a/kernel/include/linux/topology.h
+++ b/kernel/include/linux/topology.h
@@ -27,6 +27,7 @@
#ifndef _LINUX_TOPOLOGY_H
#define _LINUX_TOPOLOGY_H
+#include <linux/arch_topology.h>
#include <linux/cpumask.h>
#include <linux/bitops.h>
#include <linux/mmzone.h>
@@ -47,6 +48,7 @@
/* Conform to ACPI 2.0 SLIT distance definitions */
#define LOCAL_DISTANCE 10
#define REMOTE_DISTANCE 20
+#define DISTANCE_BITS 8
#ifndef node_distance
#define node_distance(from,to) ((from) == (to) ? LOCAL_DISTANCE : REMOTE_DISTANCE)
#endif
@@ -59,6 +61,20 @@
*/
#define RECLAIM_DISTANCE 30
#endif
+
+/*
+ * The following tunable allows platforms to override the default node
+ * reclaim distance (RECLAIM_DISTANCE) if remote memory accesses are
+ * sufficiently fast that the default value actually hurts
+ * performance.
+ *
+ * AMD EPYC machines use this because even though the 2-hop distance
+ * is 32 (3.2x slower than a local memory access) performance actually
+ * *improves* if allowed to reclaim memory and load balance tasks
+ * between NUMA nodes 2-hops apart.
+ */
+extern int __read_mostly node_reclaim_distance;
+
#ifndef PENALTY_FOR_NODE_WITH_CPUS
#define PENALTY_FOR_NODE_WITH_CPUS (1)
#endif
@@ -115,20 +131,11 @@
* Use the accessor functions set_numa_mem(), numa_mem_id() and cpu_to_mem().
*/
DECLARE_PER_CPU(int, _numa_mem_);
-extern int _node_numa_mem_[MAX_NUMNODES];
#ifndef set_numa_mem
static inline void set_numa_mem(int node)
{
this_cpu_write(_numa_mem_, node);
- _node_numa_mem_[numa_node_id()] = node;
-}
-#endif
-
-#ifndef node_to_mem_node
-static inline int node_to_mem_node(int node)
-{
- return _node_numa_mem_[node];
}
#endif
@@ -151,7 +158,6 @@
static inline void set_cpu_numa_mem(int cpu, int node)
{
per_cpu(_numa_mem_, cpu) = node;
- _node_numa_mem_[cpu_to_node(cpu)] = node;
}
#endif
@@ -162,13 +168,6 @@
static inline int numa_mem_id(void)
{
return numa_node_id();
-}
-#endif
-
-#ifndef node_to_mem_node
-static inline int node_to_mem_node(int node)
-{
- return node;
}
#endif
@@ -184,6 +183,9 @@
#ifndef topology_physical_package_id
#define topology_physical_package_id(cpu) ((void)(cpu), -1)
#endif
+#ifndef topology_die_id
+#define topology_die_id(cpu) ((void)(cpu), -1)
+#endif
#ifndef topology_core_id
#define topology_core_id(cpu) ((void)(cpu), 0)
#endif
@@ -193,8 +195,11 @@
#ifndef topology_core_cpumask
#define topology_core_cpumask(cpu) cpumask_of(cpu)
#endif
+#ifndef topology_die_cpumask
+#define topology_die_cpumask(cpu) cpumask_of(cpu)
+#endif
-#ifdef CONFIG_SCHED_SMT
+#if defined(CONFIG_SCHED_SMT) && !defined(cpu_smt_mask)
static inline const struct cpumask *cpu_smt_mask(int cpu)
{
return topology_sibling_cpumask(cpu);
--
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