diff options
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index cad4b9125695..e43142c15631 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1727,26 +1727,6 @@ static bool can_offline_normal(struct zone *zone, unsigned long nr_pages) static int __init cmdline_parse_movable_node(char *p) { #ifdef CONFIG_MOVABLE_NODE - /* - * Memory used by the kernel cannot be hot-removed because Linux - * cannot migrate the kernel pages. When memory hotplug is - * enabled, we should prevent memblock from allocating memory - * for the kernel. - * - * ACPI SRAT records all hotpluggable memory ranges. But before - * SRAT is parsed, we don't know about it. - * - * The kernel image is loaded into memory at very early time. We - * cannot prevent this anyway. So on NUMA system, we set any - * node the kernel resides in as un-hotpluggable. - * - * Since on modern servers, one node could have double-digit - * gigabytes memory, we can assume the memory around the kernel - * image is also un-hotpluggable. So before SRAT is parsed, just - * allocate memory near the kernel image to try the best to keep - * the kernel away from hotpluggable memory. - */ - memblock_set_bottom_up(true); movable_node_enabled = true; #else pr_warn("movable_node option not supported\n"); |