diff mbox series

[RFC,v2,05/21] mmzone: new pgdat flags for DRAM and PMEM

Message ID 20181226133351.348801665@intel.com (mailing list archive)
State New, archived
Headers show
Series PMEM NUMA node and hotness accounting/migration | expand

Commit Message

Fengguang Wu Dec. 26, 2018, 1:14 p.m. UTC 
From: Fan Du <fan.du@intel.com>

One system with DRAM and PMEM, we need new flag
to tag pgdat is made of DRAM or peristent memory.

This patch serves as preparetion one for follow up patch.

Signed-off-by: Fan Du <fan.du@intel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---
 include/linux/mmzone.h |   26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
diff mbox series

Patch

--- linux.orig/include/linux/mmzone.h	2018-12-23 19:29:42.430602202 +0800
+++ linux/include/linux/mmzone.h	2018-12-23 19:29:42.430602202 +0800
@@ -522,6 +522,8 @@  enum pgdat_flags {
 					 * many pages under writeback
 					 */
 	PGDAT_RECLAIM_LOCKED,		/* prevents concurrent reclaim */
+	PGDAT_DRAM,			/* Volatile DRAM memory node */
+	PGDAT_PMEM,			/* Persistent memory node */
 };
 
 static inline unsigned long zone_end_pfn(const struct zone *zone)
@@ -919,6 +921,30 @@  extern struct pglist_data contig_page_da
 
 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
 
+static inline int is_node_pmem(int nid)
+{
+	pg_data_t *pgdat = NODE_DATA(nid);
+
+	return test_bit(PGDAT_PMEM, &pgdat->flags);
+}
+
+static inline int is_node_dram(int nid)
+{
+	pg_data_t *pgdat = NODE_DATA(nid);
+
+	return test_bit(PGDAT_DRAM, &pgdat->flags);
+}
+
+static inline void set_node_type(int nid)
+{
+	pg_data_t *pgdat = NODE_DATA(nid);
+
+	if (node_isset(nid, numa_nodes_pmem))
+		set_bit(PGDAT_PMEM, &pgdat->flags);
+	else
+		set_bit(PGDAT_DRAM, &pgdat->flags);
+}
+
 extern struct pglist_data *first_online_pgdat(void);
 extern struct pglist_data *next_online_pgdat(struct pglist_data *pgdat);
 extern struct zone *next_zone(struct zone *zone);