diff options
Diffstat (limited to 'mm/util.c')
| -rw-r--r-- | mm/util.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/mm/util.c b/mm/util.c index eaf63fc2c92f..808f375648e7 100644 --- a/mm/util.c +++ b/mm/util.c @@ -7,6 +7,9 @@ #include <linux/security.h> #include <linux/swap.h> #include <linux/swapops.h> +#include <linux/mman.h> +#include <linux/hugetlb.h> + #include <asm/uaccess.h> #include "internal.h" @@ -387,7 +390,10 @@ struct address_space *page_mapping(struct page *page) { struct address_space *mapping = page->mapping; - VM_BUG_ON(PageSlab(page)); + /* This happens if someone calls flush_dcache_page on slab page */ + if (unlikely(PageSlab(page))) + return NULL; + if (unlikely(PageSwapCache(page))) { swp_entry_t entry; @@ -398,6 +404,16 @@ struct address_space *page_mapping(struct page *page) return mapping; } +/* + * Committed memory limit enforced when OVERCOMMIT_NEVER policy is used + */ +unsigned long vm_commit_limit(void) +{ + return ((totalram_pages - hugetlb_total_pages()) + * sysctl_overcommit_ratio / 100) + total_swap_pages; +} + + /* Tracepoints definitions. */ EXPORT_TRACEPOINT_SYMBOL(kmalloc); EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc); |