#include <trace/events/cma.h>
#include "cma.h"
-#include "internal.h"
struct cma cma_areas[MAX_CMA_AREAS];
unsigned cma_area_count;
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++) {
- if (!pfn_valid(pfn))
- goto err;
-
+ WARN_ON_ONCE(!pfn_valid(pfn));
/*
- * In init_cma_reserved_pageblock(), present_pages
- * is adjusted with assumption that all pages in
- * the pageblock come from a single zone.
+ * 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.
*/
if (page_zone(pfn_to_page(pfn)) != zone)
- goto err;
+ goto not_in_zone;
}
init_cma_reserved_pageblock(pfn_to_page(base_pfn));
} while (--i);
return 0;
-err:
+not_in_zone:
pr_err("CMA area %s could not be activated\n", cma->name);
kfree(cma->bitmap);
cma->count = 0;
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]);
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;
}
-pure_initcall(cma_init_reserved_areas);
+core_initcall(cma_init_reserved_areas);
/**
* cma_init_reserved_mem() - create custom contiguous area from reserved memory
}
#ifdef CONFIG_CMA
-static void __init adjust_present_page_count(struct page *page, long count)
-{
- struct zone *zone = page_zone(page);
-
- /* We don't need to hold a lock since it is boot-up process */
- zone->present_pages += count;
-}
-
/* Free whole pageblock and set its migration type to MIGRATE_CMA. */
void __init init_cma_reserved_pageblock(struct page *page)
{
unsigned i = pageblock_nr_pages;
- unsigned long pfn = page_to_pfn(page);
struct page *p = page;
- int nid = page_to_nid(page);
-
- /*
- * ZONE_MOVABLE will steal present pages from other zones by
- * changing page links so page_zone() is changed. Before that,
- * we need to adjust previous zone's page count first.
- */
- adjust_present_page_count(page, -pageblock_nr_pages);
do {
__ClearPageReserved(p);
set_page_count(p, 0);
-
- /* Steal pages from other zones */
- set_page_links(p, ZONE_MOVABLE, nid, pfn);
- } while (++p, ++pfn, --i);
-
- adjust_present_page_count(page, pageblock_nr_pages);
+ } while (++p, --i);
set_pageblock_migratetype(page, MIGRATE_CMA);
* exists.
*/
watermark = min_wmark_pages(zone) + (1UL << order);
- if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
+ if (!zone_watermark_ok(zone, 0, watermark, 0, ALLOC_CMA))
return 0;
__mod_zone_freepage_state(zone, -(1UL << order), mt);
}
+#ifdef CONFIG_CMA
+ /* If allocation can't use CMA areas don't use free CMA pages */
+ if (!(alloc_flags & ALLOC_CMA))
+ free_pages -= zone_page_state(z, NR_FREE_CMA_PAGES);
+#endif
+
/*
* Check watermarks for an order-0 allocation request. If these
* are not met, then a high-order request also cannot go ahead
}
#ifdef CONFIG_CMA
- if (!list_empty(&area->free_list[MIGRATE_CMA]))
+ if ((alloc_flags & ALLOC_CMA) &&
+ !list_empty(&area->free_list[MIGRATE_CMA])) {
return true;
+ }
#endif
if (alloc_harder &&
!list_empty(&area->free_list[MIGRATE_HIGHATOMIC]))
unsigned long mark, int classzone_idx, unsigned int alloc_flags)
{
long free_pages = zone_page_state(z, NR_FREE_PAGES);
+ long cma_pages = 0;
+
+#ifdef CONFIG_CMA
+ /* If allocation can't use CMA areas don't use free CMA pages */
+ if (!(alloc_flags & ALLOC_CMA))
+ cma_pages = zone_page_state(z, NR_FREE_CMA_PAGES);
+#endif
/*
* Fast check for order-0 only. If this fails then the reserves
* the caller is !atomic then it'll uselessly search the free
* list. That corner case is then slower but it is harmless.
*/
- if (!order && free_pages > mark + z->lowmem_reserve[classzone_idx])
+ if (!order && (free_pages - cma_pages) > mark + z->lowmem_reserve[classzone_idx])
return true;
return __zone_watermark_ok(z, order, mark, classzone_idx, alloc_flags,
} else if (unlikely(rt_task(current)) && !in_interrupt())
alloc_flags |= ALLOC_HARDER;
+#ifdef CONFIG_CMA
+ if (gfpflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
+ alloc_flags |= ALLOC_CMA;
+#endif
return alloc_flags;
}
if (should_fail_alloc_page(gfp_mask, order))
return false;
+ if (IS_ENABLED(CONFIG_CMA) && ac->migratetype == MIGRATE_MOVABLE)
+ *alloc_flags |= ALLOC_CMA;
+
return true;
}
{
enum zone_type j;
int nid = pgdat->node_id;
- unsigned long node_end_pfn = 0;
pgdat_resize_init(pgdat);
#ifdef CONFIG_NUMA_BALANCING
struct zone *zone = pgdat->node_zones + j;
unsigned long size, realsize, freesize, memmap_pages;
unsigned long zone_start_pfn = zone->zone_start_pfn;
- unsigned long movable_size = 0;
size = zone->spanned_pages;
realsize = freesize = zone->present_pages;
- if (zone_end_pfn(zone) > node_end_pfn)
- node_end_pfn = zone_end_pfn(zone);
-
/*
* Adjust freesize so that it accounts for how much memory
zone_seqlock_init(zone);
zone_pcp_init(zone);
- /*
- * The size of the CMA area is unknown now so we need to
- * prepare the memory for the usemap at maximum.
- */
- if (IS_ENABLED(CONFIG_CMA) && j == ZONE_MOVABLE &&
- pgdat->node_spanned_pages) {
- movable_size = node_end_pfn - pgdat->node_start_pfn;
- }
-
- if (!size && !movable_size)
+ if (!size)
continue;
set_pageblock_order();
- if (movable_size) {
- zone->zone_start_pfn = pgdat->node_start_pfn;
- zone->spanned_pages = movable_size;
- setup_usemap(pgdat, zone,
- pgdat->node_start_pfn, movable_size);
- init_currently_empty_zone(zone,
- pgdat->node_start_pfn, movable_size);
- } else {
- setup_usemap(pgdat, zone, zone_start_pfn, size);
- init_currently_empty_zone(zone, zone_start_pfn, size);
- }
+ setup_usemap(pgdat, zone, zone_start_pfn, size);
+ init_currently_empty_zone(zone, zone_start_pfn, size);
memmap_init(size, nid, j, zone_start_pfn);
}
}
}
#endif
-#if defined CONFIG_MEMORY_HOTPLUG || defined CONFIG_CMA
+#ifdef CONFIG_MEMORY_HOTPLUG
/*
* The zone indicated has a new number of managed_pages; batch sizes and percpu
* page high values need to be recalulated.
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