From: Yinghai Lu <ying...@kernel.org>
Move node_possible_map handling out of numa_check_memblks()
to avoid side effect when changing numa_check_memblks().
Only set node_possible_map once for successful path instead
of resetting in numa_init() every time.
Suggested-by: Tejun Heo <t...@kernel.org>
Signed-off-by: Yinghai Lu <ying...@kernel.org>
Reviewed-by: Tang Chen <tangc...@cn.fujitsu.com>
Tested-by: Tang Chen <tangc...@cn.fujitsu.com>
---
arch/x86/mm/numa.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index e448b6f..da2ebab 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -536,12 +536,13 @@ static unsigned long __init node_map_pfn_alignment(struct
numa_meminfo *mi)
static int __init numa_check_memblks(struct numa_meminfo *mi)
{
+ nodemask_t nodes_parsed;
unsigned long pfn_align;
/* Account for nodes with cpus and no memory */
- node_possible_map = numa_nodes_parsed;
- numa_nodemask_from_meminfo(&node_possible_map, mi);
- if (WARN_ON(nodes_empty(node_possible_map)))
+ nodes_parsed = numa_nodes_parsed;
+ numa_nodemask_from_meminfo(&nodes_parsed, mi);
+ if (WARN_ON(nodes_empty(nodes_parsed)))
return -EINVAL;
if (!numa_meminfo_cover_memory(mi))
@@ -593,7 +594,6 @@ static int __init numa_init(int (*init_func)(void))
set_apicid_to_node(i, NUMA_NO_NODE);
nodes_clear(numa_nodes_parsed);
- nodes_clear(node_possible_map);
memset(&numa_meminfo, 0, sizeof(numa_meminfo));
numa_reset_distance();
@@ -669,6 +669,9 @@ void __init x86_numa_init(void)
early_x86_numa_init();
+ node_possible_map = numa_nodes_parsed;
+ numa_nodemask_from_meminfo(&node_possible_map, mi);
+
for (i = 0; i < mi->nr_blks; i++) {
struct numa_memblk *mb = &mi->blk[i];
memblock_set_node(mb->start, mb->end - mb->start, mb->nid);
--
1.7.1
--
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