#include <linux/backing-dev.h>
#include <linux/fault-inject.h>
#include <linux/page-isolation.h>
+#include <linux/page_ext.h>
#include <linux/debugobjects.h>
#include <linux/kmemleak.h>
#include <linux/compaction.h>
#include <linux/prefetch.h>
#include <linux/mm_inline.h>
#include <linux/migrate.h>
-#include <linux/page-debug-flags.h>
+#include <linux/page_ext.h>
#include <linux/hugetlb.h>
#include <linux/sched/rt.h>
+#include <linux/page_owner.h>
#include <asm/sections.h>
#include <asm/tlbflush.h>
unsigned long totalram_pages __read_mostly;
unsigned long totalreserve_pages __read_mostly;
+unsigned long totalcma_pages __read_mostly;
/*
* When calculating the number of globally allowed dirty pages, there
* is a certain number of per-zone reserves that should not be
#ifdef CONFIG_DEBUG_PAGEALLOC
unsigned int _debug_guardpage_minorder;
+bool _debug_pagealloc_enabled __read_mostly;
+bool _debug_guardpage_enabled __read_mostly;
+
+static int __init early_debug_pagealloc(char *buf)
+{
+ if (!buf)
+ return -EINVAL;
+
+ if (strcmp(buf, "on") == 0)
+ _debug_pagealloc_enabled = true;
+
+ return 0;
+}
+early_param("debug_pagealloc", early_debug_pagealloc);
+
+static bool need_debug_guardpage(void)
+{
+ /* If we don't use debug_pagealloc, we don't need guard page */
+ if (!debug_pagealloc_enabled())
+ return false;
+
+ return true;
+}
+
+static void init_debug_guardpage(void)
+{
+ if (!debug_pagealloc_enabled())
+ return;
+
+ _debug_guardpage_enabled = true;
+}
+
+struct page_ext_operations debug_guardpage_ops = {
+ .need = need_debug_guardpage,
+ .init = init_debug_guardpage,
+};
static int __init debug_guardpage_minorder_setup(char *buf)
{
}
__setup("debug_guardpage_minorder=", debug_guardpage_minorder_setup);
-static inline void set_page_guard_flag(struct page *page)
+static inline void set_page_guard(struct zone *zone, struct page *page,
+ unsigned int order, int migratetype)
{
- __set_bit(PAGE_DEBUG_FLAG_GUARD, &page->debug_flags);
+ struct page_ext *page_ext;
+
+ if (!debug_guardpage_enabled())
+ return;
+
+ page_ext = lookup_page_ext(page);
+ __set_bit(PAGE_EXT_DEBUG_GUARD, &page_ext->flags);
+
+ INIT_LIST_HEAD(&page->lru);
+ set_page_private(page, order);
+ /* Guard pages are not available for any usage */
+ __mod_zone_freepage_state(zone, -(1 << order), migratetype);
}
-static inline void clear_page_guard_flag(struct page *page)
+static inline void clear_page_guard(struct zone *zone, struct page *page,
+ unsigned int order, int migratetype)
{
- __clear_bit(PAGE_DEBUG_FLAG_GUARD, &page->debug_flags);
+ struct page_ext *page_ext;
+
+ if (!debug_guardpage_enabled())
+ return;
+
+ page_ext = lookup_page_ext(page);
+ __clear_bit(PAGE_EXT_DEBUG_GUARD, &page_ext->flags);
+
+ set_page_private(page, 0);
+ if (!is_migrate_isolate(migratetype))
+ __mod_zone_freepage_state(zone, (1 << order), migratetype);
}
#else
-static inline void set_page_guard_flag(struct page *page) { }
-static inline void clear_page_guard_flag(struct page *page) { }
+struct page_ext_operations debug_guardpage_ops = { NULL, };
+static inline void set_page_guard(struct zone *zone, struct page *page,
+ unsigned int order, int migratetype) {}
+static inline void clear_page_guard(struct zone *zone, struct page *page,
+ unsigned int order, int migratetype) {}
#endif
static inline void set_page_order(struct page *page, unsigned int order)
* merge with it and move up one order.
*/
if (page_is_guard(buddy)) {
- clear_page_guard_flag(buddy);
- set_page_private(buddy, 0);
- if (!is_migrate_isolate(migratetype)) {
- __mod_zone_freepage_state(zone, 1 << order,
- migratetype);
- }
+ clear_page_guard(zone, buddy, order, migratetype);
} else {
list_del(&buddy->lru);
zone->free_area[order].nr_free--;
if (bad)
return false;
+ reset_page_owner(page, order);
+
if (!PageHighMem(page)) {
debug_check_no_locks_freed(page_address(page),
PAGE_SIZE << order);
size >>= 1;
VM_BUG_ON_PAGE(bad_range(zone, &page[size]), &page[size]);
-#ifdef CONFIG_DEBUG_PAGEALLOC
- if (high < debug_guardpage_minorder()) {
+ if (IS_ENABLED(CONFIG_DEBUG_PAGEALLOC) &&
+ debug_guardpage_enabled() &&
+ high < debug_guardpage_minorder()) {
/*
* Mark as guard pages (or page), that will allow to
* merge back to allocator when buddy will be freed.
* Corresponding page table entries will not be touched,
* pages will stay not present in virtual address space
*/
- INIT_LIST_HEAD(&page[size].lru);
- set_page_guard_flag(&page[size]);
- set_page_private(&page[size], high);
- /* Guard pages are not available for any usage */
- __mod_zone_freepage_state(zone, -(1 << high),
- migratetype);
+ set_page_guard(zone, &page[size], high, migratetype);
continue;
}
-#endif
list_add(&page[size].lru, &area->free_list[migratetype]);
area->nr_free++;
set_page_order(&page[size], high);
if (order && (gfp_flags & __GFP_COMP))
prep_compound_page(page, order);
+ set_page_owner(page, order, gfp_flags);
+
return 0;
}
split_page(virt_to_page(page[0].shadow), order);
#endif
- for (i = 1; i < (1 << order); i++)
+ set_page_owner(page, 0, 0);
+ for (i = 1; i < (1 << order); i++) {
set_page_refcounted(page + i);
+ set_page_owner(page + i, 0, 0);
+ }
}
EXPORT_SYMBOL_GPL(split_page);
}
}
+ set_page_owner(page, order, 0);
return 1UL << order;
}
/*
* Scan zonelist, looking for a zone with enough free.
- * See also __cpuset_node_allowed_softwall() comment in kernel/cpuset.c.
+ * See also __cpuset_node_allowed() comment in kernel/cpuset.c.
*/
for_each_zone_zonelist_nodemask(zone, z, zonelist,
high_zoneidx, nodemask) {
continue;
if (cpusets_enabled() &&
(alloc_flags & ALLOC_CPUSET) &&
- !cpuset_zone_allowed_softwall(zone, gfp_mask))
+ !cpuset_zone_allowed(zone, gfp_mask))
continue;
/*
* Distribute pages in proportion to the individual
alloc_flags |= ALLOC_HARDER;
/*
* Ignore cpuset mems for GFP_ATOMIC rather than fail, see the
- * comment for __cpuset_node_allowed_softwall().
+ * comment for __cpuset_node_allowed().
*/
alloc_flags &= ~ALLOC_CPUSET;
} else if (unlikely(rt_task(current)) && !in_interrupt())
#endif
init_waitqueue_head(&pgdat->kswapd_wait);
init_waitqueue_head(&pgdat->pfmemalloc_wait);
+ pgdat_page_ext_init(pgdat);
for (j = 0; j < MAX_NR_ZONES; j++) {
struct zone *zone = pgdat->node_zones + j;
* and per-cpu initialisations
*/
memmap_pages = calc_memmap_size(size, realsize);
- if (freesize >= memmap_pages) {
- freesize -= memmap_pages;
- if (memmap_pages)
- printk(KERN_DEBUG
- " %s zone: %lu pages used for memmap\n",
- zone_names[j], memmap_pages);
- } else
- printk(KERN_WARNING
- " %s zone: %lu pages exceeds freesize %lu\n",
- zone_names[j], memmap_pages, freesize);
+ if (!is_highmem_idx(j)) {
+ if (freesize >= memmap_pages) {
+ freesize -= memmap_pages;
+ if (memmap_pages)
+ printk(KERN_DEBUG
+ " %s zone: %lu pages used for memmap\n",
+ zone_names[j], memmap_pages);
+ } else
+ printk(KERN_WARNING
+ " %s zone: %lu pages exceeds freesize %lu\n",
+ zone_names[j], memmap_pages, freesize);
+ }
/* Account for reserved pages */
if (j == 0 && freesize > dma_reserve) {
pr_info("Memory: %luK/%luK available "
"(%luK kernel code, %luK rwdata, %luK rodata, "
- "%luK init, %luK bss, %luK reserved"
+ "%luK init, %luK bss, %luK reserved, %luK cma-reserved"
#ifdef CONFIG_HIGHMEM
", %luK highmem"
#endif
nr_free_pages() << (PAGE_SHIFT-10), physpages << (PAGE_SHIFT-10),
codesize >> 10, datasize >> 10, rosize >> 10,
(init_data_size + init_code_size) >> 10, bss_size >> 10,
- (physpages - totalram_pages) << (PAGE_SHIFT-10),
+ (physpages - totalram_pages - totalcma_pages) << (PAGE_SHIFT-10),
+ totalcma_pages << (PAGE_SHIFT-10),
#ifdef CONFIG_HIGHMEM
totalhigh_pages << (PAGE_SHIFT-10),
#endif
if (!PageLRU(page))
found++;
/*
- * If there are RECLAIMABLE pages, we need to check it.
- * But now, memory offline itself doesn't call shrink_slab()
- * and it still to be fixed.
+ * If there are RECLAIMABLE pages, we need to check
+ * it. But now, memory offline itself doesn't call
+ * shrink_node_slabs() and it still to be fixed.
*/
/*
* If the page is not RAM, page_count()should be 0.
projects / cascardo / linux.git / blobdiff