diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 17d5f539a9aa..0727896a88ac 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -23,6 +23,7 @@ #include <linux/bootmem.h> #include <linux/compiler.h> #include <linux/kernel.h> +#include <linux/kmemcheck.h> #include <linux/module.h> #include <linux/suspend.h> #include <linux/pagevec.h> @@ -546,6 +547,8 @@ static void __free_pages_ok(struct page *page, unsigned int order) int i; int bad = 0; + kmemcheck_free_shadow(page, order); + for (i = 0 ; i < (1 << order) ; ++i) bad += free_pages_check(page + i); if (bad) @@ -994,6 +997,8 @@ static void free_hot_cold_page(struct page *page, int cold) struct per_cpu_pages *pcp; unsigned long flags; + kmemcheck_free_shadow(page, 0); + if (PageAnon(page)) page->mapping = NULL; if (free_pages_check(page)) @@ -1047,6 +1052,16 @@ void split_page(struct page *page, unsigned int order) VM_BUG_ON(PageCompound(page)); VM_BUG_ON(!page_count(page)); + +#ifdef CONFIG_KMEMCHECK + /* + * Split shadow pages too, because free(page[0]) would + * otherwise free the whole shadow. + */ + if (kmemcheck_page_is_tracked(page)) + split_page(virt_to_page(page[0].shadow), order); +#endif + for (i = 1; i < (1 << order); i++) set_page_refcounted(page + i); } @@ -1667,7 +1682,10 @@ nopage: dump_stack(); show_mem(); } + return page; got_pg: + if (kmemcheck_enabled) + kmemcheck_pagealloc_alloc(page, order, gfp_mask); return page; } EXPORT_SYMBOL(__alloc_pages_internal); |