aboutsummaryrefslogtreecommitdiff
path: root/mm/cma.c
diff options
context:
space:
mode:
Diffstat (limited to 'mm/cma.c')
-rw-r--r--mm/cma.c83
1 files changed, 72 insertions, 11 deletions
diff --git a/mm/cma.c b/mm/cma.c
index 5809bbe360d7..aa40e6c7b042 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -39,6 +39,7 @@
#include <trace/events/cma.h>
#include "cma.h"
+#include "internal.h"
struct cma cma_areas[MAX_CMA_AREAS];
unsigned cma_area_count;
@@ -109,23 +110,25 @@ static int __init cma_activate_area(struct cma *cma)
if (!cma->bitmap)
return -ENOMEM;
- WARN_ON_ONCE(!pfn_valid(pfn));
- zone = page_zone(pfn_to_page(pfn));
-
do {
unsigned j;
base_pfn = pfn;
+ if (!pfn_valid(base_pfn))
+ goto err;
+
+ zone = page_zone(pfn_to_page(base_pfn));
for (j = pageblock_nr_pages; j; --j, pfn++) {
- WARN_ON_ONCE(!pfn_valid(pfn));
+ if (!pfn_valid(pfn))
+ goto err;
+
/*
- * alloc_contig_range requires the pfn range
- * specified to be in the same zone. Make this
- * simple by forcing the entire CMA resv range
- * to be in the same zone.
+ * In init_cma_reserved_pageblock(), present_pages
+ * is adjusted with assumption that all pages in
+ * the pageblock come from a single zone.
*/
if (page_zone(pfn_to_page(pfn)) != zone)
- goto not_in_zone;
+ goto err;
}
init_cma_reserved_pageblock(pfn_to_page(base_pfn));
} while (--i);
@@ -139,7 +142,7 @@ static int __init cma_activate_area(struct cma *cma)
return 0;
-not_in_zone:
+err:
pr_err("CMA area %s could not be activated\n", cma->name);
kfree(cma->bitmap);
cma->count = 0;
@@ -149,6 +152,41 @@ not_in_zone:
static int __init cma_init_reserved_areas(void)
{
int i;
+ struct zone *zone;
+ pg_data_t *pgdat;
+
+ if (!cma_area_count)
+ return 0;
+
+ for_each_online_pgdat(pgdat) {
+ unsigned long start_pfn = UINT_MAX, end_pfn = 0;
+
+ zone = &pgdat->node_zones[ZONE_MOVABLE];
+
+ /*
+ * In this case, we cannot adjust the zone range
+ * since it is now maximum node span and we don't
+ * know original zone range.
+ */
+ if (populated_zone(zone))
+ continue;
+
+ for (i = 0; i < cma_area_count; i++) {
+ if (pfn_to_nid(cma_areas[i].base_pfn) !=
+ pgdat->node_id)
+ continue;
+
+ start_pfn = min(start_pfn, cma_areas[i].base_pfn);
+ end_pfn = max(end_pfn, cma_areas[i].base_pfn +
+ cma_areas[i].count);
+ }
+
+ if (!end_pfn)
+ continue;
+
+ zone->zone_start_pfn = start_pfn;
+ zone->spanned_pages = end_pfn - start_pfn;
+ }
for (i = 0; i < cma_area_count; i++) {
int ret = cma_activate_area(&cma_areas[i]);
@@ -157,9 +195,32 @@ static int __init cma_init_reserved_areas(void)
return ret;
}
+ /*
+ * Reserved pages for ZONE_MOVABLE are now activated and
+ * this would change ZONE_MOVABLE's managed page counter and
+ * the other zones' present counter. We need to re-calculate
+ * various zone information that depends on this initialization.
+ */
+ build_all_zonelists(NULL);
+ for_each_populated_zone(zone) {
+ if (zone_idx(zone) == ZONE_MOVABLE) {
+ zone_pcp_reset(zone);
+ setup_zone_pageset(zone);
+ } else
+ zone_pcp_update(zone);
+
+ set_zone_contiguous(zone);
+ }
+
+ /*
+ * We need to re-init per zone wmark by calling
+ * init_per_zone_wmark_min() but doesn't call here because it is
+ * registered on core_initcall and it will be called later than us.
+ */
+
return 0;
}
-core_initcall(cma_init_reserved_areas);
+pure_initcall(cma_init_reserved_areas);
/**
* cma_init_reserved_mem() - create custom contiguous area from reserved memory