diff --git a/mm/internal.h b/mm/internal.h
index 88ac7be741ca5459f8d7d1e951a7b0177fb213d3..71d160437205724f283a8ece5aa6139060fd6c9d 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -400,9 +400,15 @@ static inline void mminit_verify_zonelist(void)
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
#define __defermem_init __meminit
#define __defer_init __meminit
+
+void deferred_init_memmap(int nid);
#else
#define __defermem_init
#define __defer_init __init
+
+static inline void deferred_init_memmap(int nid)
+{
+}
#endif
/* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 5f420f7fafa1c6b6bd74cdf3b6e9cfb5e7874f87..28fbf87b20aaf74479e9442e67d2937bb6a74207 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -11,6 +11,7 @@
#include <linux/export.h>
#include <linux/memory.h>
#include <linux/notifier.h>
+#include <linux/sched.h>
#include "internal.h"
#ifdef CONFIG_DEBUG_MEMORY_INIT
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7af45b2e8870647e0ba98f6a62fc802667ec8881..c30f5a0535fd55b966ee86a9520bef55b5834606 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -252,6 +252,14 @@ static inline bool __defermem_init early_page_uninitialised(unsigned long pfn)
return false;
}
+static inline bool early_page_nid_uninitialised(unsigned long pfn, int nid)
+{
+ if (pfn >= NODE_DATA(nid)->first_deferred_pfn)
+ return true;
+
+ return false;
+}
+
/*
* Returns false when the remaining initialisation should be deferred until
* later in the boot cycle when it can be parallelised.
@@ -284,6 +292,11 @@ static inline bool early_page_uninitialised(unsigned long pfn)
return false;
}
+static inline bool early_page_nid_uninitialised(unsigned long pfn, int nid)
+{
+ return false;
+}
+
static inline bool update_defer_init(pg_data_t *pgdat,
unsigned long pfn, unsigned long zone_end,
unsigned long *nr_initialised)
@@ -866,20 +879,51 @@ static void __meminit __init_single_pfn(unsigned long pfn, unsigned long zone,
return __init_single_page(pfn_to_page(pfn), pfn, zone, nid);
}
+#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+static void init_reserved_page(unsigned long pfn)
+{
+ pg_data_t *pgdat;
+ int nid, zid;
+
+ if (!early_page_uninitialised(pfn))
+ return;
+
+ nid = early_pfn_to_nid(pfn);
+ pgdat = NODE_DATA(nid);
+
+ for (zid = 0; zid < MAX_NR_ZONES; zid++) {
+ struct zone *zone = &pgdat->node_zones[zid];
+
+ if (pfn >= zone->zone_start_pfn && pfn < zone_end_pfn(zone))
+ break;
+ }
+ __init_single_pfn(pfn, zid, nid);
+}
+#else
+static inline void init_reserved_page(unsigned long pfn)
+{
+}
+#endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
+
/*
* Initialised pages do not have PageReserved set. This function is
* called for each range allocated by the bootmem allocator and
* marks the pages PageReserved. The remaining valid pages are later
* sent to the buddy page allocator.
*/
-void reserve_bootmem_region(unsigned long start, unsigned long end)
+void __meminit reserve_bootmem_region(unsigned long start, unsigned long end)
{
unsigned long start_pfn = PFN_DOWN(start);
unsigned long end_pfn = PFN_UP(end);
- for (; start_pfn < end_pfn; start_pfn++)
- if (pfn_valid(start_pfn))
- SetPageReserved(pfn_to_page(start_pfn));
+ for (; start_pfn < end_pfn; start_pfn++) {
+ if (pfn_valid(start_pfn)) {
+ struct page *page = pfn_to_page(start_pfn);
+
+ init_reserved_page(start_pfn);
+ SetPageReserved(page);
+ }
+ }
}
static bool free_pages_prepare(struct page *page, unsigned int order)
@@ -1017,6 +1061,74 @@ void __defer_init __free_pages_bootmem(struct page *page, unsigned long pfn,
return __free_pages_boot_core(page, pfn, order);
}
+#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
+/* Initialise remaining memory on a node */
+void __defermem_init deferred_init_memmap(int nid)
+{
+ struct mminit_pfnnid_cache nid_init_state = { };
+ unsigned long start = jiffies;
+ unsigned long nr_pages = 0;
+ unsigned long walk_start, walk_end;
+ int i, zid;
+ struct zone *zone;
+ pg_data_t *pgdat = NODE_DATA(nid);
+ unsigned long first_init_pfn = pgdat->first_deferred_pfn;
+
+ if (first_init_pfn == ULONG_MAX)
+ return;
+
+ /* Sanity check boundaries */
+ BUG_ON(pgdat->first_deferred_pfn < pgdat->node_start_pfn);
+ BUG_ON(pgdat->first_deferred_pfn > pgdat_end_pfn(pgdat));
+ pgdat->first_deferred_pfn = ULONG_MAX;
+
+ /* Only the highest zone is deferred so find it */
+ for (zid = 0; zid < MAX_NR_ZONES; zid++) {
+ zone = pgdat->node_zones + zid;
+ if (first_init_pfn < zone_end_pfn(zone))
+ break;
+ }
+
+ for_each_mem_pfn_range(i, nid, &walk_start, &walk_end, NULL) {
+ unsigned long pfn, end_pfn;
+
+ end_pfn = min(walk_end, zone_end_pfn(zone));
+ pfn = first_init_pfn;
+ if (pfn < walk_start)
+ pfn = walk_start;
+ if (pfn < zone->zone_start_pfn)
+ pfn = zone->zone_start_pfn;
+
+ for (; pfn < end_pfn; pfn++) {
+ struct page *page;
+
+ if (!pfn_valid(pfn))
+ continue;
+
+ if (!meminit_pfn_in_nid(pfn, nid, &nid_init_state))
+ continue;
+
+ if (page->flags) {
+ VM_BUG_ON(page_zone(page) != zone);
+ continue;
+ }
+
+ __init_single_page(page, pfn, zid, nid);
+ __free_pages_boot_core(page, pfn, 0);
+ nr_pages++;
+ cond_resched();
+ }
+ first_init_pfn = max(end_pfn, first_init_pfn);
+ }
+
+ /* Sanity check that the next zone really is unpopulated */
+ WARN_ON(++zid < MAX_NR_ZONES && populated_zone(++zone));
+
+ pr_info("kswapd %d initialised %lu pages in %ums\n", nid, nr_pages,
+ jiffies_to_msecs(jiffies - start));
+}
+#endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
+
#ifdef CONFIG_CMA
/* Free whole pageblock and set its migration type to MIGRATE_CMA. */
void __init init_cma_reserved_pageblock(struct page *page)
@@ -4329,6 +4441,9 @@ static void setup_zone_migrate_reserve(struct zone *zone)
zone->nr_migrate_reserve_block = reserve;
for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) {
+ if (!early_page_nid_uninitialised(pfn, zone_to_nid(zone)))
+ return;
+
if (!pfn_valid(pfn))
continue;
page = pfn_to_page(pfn);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index e61445dce04e3cc83e9704e84f3d5bf9074b31db..f4a4871107645ddacd22d6ab9c3db0c492e628ee 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3386,7 +3386,7 @@ static void kswapd_try_to_sleep(pg_data_t *pgdat, int order, int classzone_idx)
* If there are applications that are active memory-allocators
* (most normal use), this basically shouldn't matter.
*/
-static int kswapd(void *p)
+static int __defermem_init kswapd(void *p)
{
unsigned long order, new_order;
unsigned balanced_order;
@@ -3421,6 +3421,8 @@ static int kswapd(void *p)
tsk->flags |= PF_MEMALLOC | PF_SWAPWRITE | PF_KSWAPD;
set_freezable();
+ deferred_init_memmap(pgdat->node_id);
+
order = new_order = 0;
balanced_order = 0;
classzone_idx = new_classzone_idx = pgdat->nr_zones - 1;
@@ -3576,7 +3578,7 @@ static int cpu_callback(struct notifier_block *nfb, unsigned long action,
* This kswapd start function will be called by init and node-hot-add.
* On node-hot-add, kswapd will moved to proper cpus if cpus are hot-added.
*/
-int kswapd_run(int nid)
+int __defermem_init kswapd_run(int nid)
{
pg_data_t *pgdat = NODE_DATA(nid);
int ret = 0;