We call hotadd_new_pgdat() to allocate memory to store node_data. So we should free it when removing a node. CC: David Rientjes <rientjes@xxxxxxxxxx> CC: Jiang Liu <liuj97@xxxxxxxxx> CC: Len Brown <len.brown@xxxxxxxxx> CC: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> CC: Paul Mackerras <paulus@xxxxxxxxx> CC: Christoph Lameter <cl@xxxxxxxxx> Cc: Minchan Kim <minchan.kim@xxxxxxxxx> CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> CC: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> CC: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx> --- mm/memory_hotplug.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index d965da3..e281c31 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1320,9 +1320,12 @@ static int check_cpu_on_node(void *data) /* offline the node if all memory sections of this node are removed */ static void try_offline_node(int nid) { + pg_data_t *pgdat = NODE_DATA(nid); unsigned long start_pfn = NODE_DATA(nid)->node_start_pfn; - unsigned long end_pfn = start_pfn + NODE_DATA(nid)->node_spanned_pages; + unsigned long end_pfn = start_pfn + pgdat->node_spanned_pages; unsigned long pfn; + struct page *pgdat_page = virt_to_page(pgdat); + int i; for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { unsigned long section_nr = pfn_to_section_nr(pfn); @@ -1349,6 +1352,21 @@ static void try_offline_node(int nid) */ node_set_offline(nid); unregister_one_node(nid); + + if (!PageSlab(pgdat_page) && !PageCompound(pgdat_page)) + /* node data is allocated from boot memory */ + return; + + /* free waittable in each zone */ + for (i = 0; i < MAX_NR_ZONES; i++) { + struct zone *zone = pgdat->node_zones + i; + + if (zone->wait_table) + vfree(zone->wait_table); + } + + arch_refresh_nodedata(nid, NULL); + arch_free_nodedata(pgdat); } int __ref remove_memory(int nid, u64 start, u64 size) -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html