x86-64, NUMA: Kill mem_nodes_parsed
With all memory configuration information now carried in numa_meminfo,
there's no need to keep mem_nodes_parsed separate. Drop it and use
numa_nodes_parsed for CPU / memory-less nodes.
A new helper numa_nodemask_from_meminfo() is added to calculate
memnode mask on the fly which is currently used to set
node_possible_map.
This simplifies NUMA init methods a bit and removes a source of
possible inconsistencies.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 6e4fbd7..8b1f178 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -37,7 +37,6 @@
EXPORT_SYMBOL(node_data);
nodemask_t numa_nodes_parsed __initdata;
-nodemask_t mem_nodes_parsed __initdata;
struct memnode memnode;
@@ -344,6 +343,20 @@
}
/*
+ * Set nodes, which have memory in @mi, in *@nodemask.
+ */
+static void __init numa_nodemask_from_meminfo(nodemask_t *nodemask,
+ const struct numa_meminfo *mi)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mi->blk); i++)
+ if (mi->blk[i].start != mi->blk[i].end &&
+ mi->blk[i].nid != NUMA_NO_NODE)
+ node_set(mi->blk[i].nid, *nodemask);
+}
+
+/*
* Sanity check to catch more bad NUMA configurations (they are amazingly
* common). Make sure the nodes cover all memory.
*/
@@ -379,7 +392,8 @@
int i, j, nid;
/* Account for nodes with cpus and no memory */
- nodes_or(node_possible_map, mem_nodes_parsed, numa_nodes_parsed);
+ node_possible_map = numa_nodes_parsed;
+ numa_nodemask_from_meminfo(&node_possible_map, mi);
if (WARN_ON(nodes_empty(node_possible_map)))
return -EINVAL;
@@ -824,7 +838,6 @@
0LU, max_pfn << PAGE_SHIFT);
node_set(0, numa_nodes_parsed);
- node_set(0, mem_nodes_parsed);
numa_add_memblk(0, 0, (u64)max_pfn << PAGE_SHIFT);
return 0;
@@ -852,7 +865,6 @@
set_apicid_to_node(j, NUMA_NO_NODE);
nodes_clear(numa_nodes_parsed);
- nodes_clear(mem_nodes_parsed);
nodes_clear(node_possible_map);
nodes_clear(node_online_map);
memset(&numa_meminfo, 0, sizeof(numa_meminfo));