diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm_types.h | 9 | ||||
| -rw-r--r-- | include/linux/page-flags.h | 29 |
2 files changed, 38 insertions, 0 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 074eb98fe15..375e79eb009 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -54,6 +54,15 @@ struct page { union { pgoff_t index; /* Our offset within mapping. */ void *freelist; /* slub/slob first free object */ + bool pfmemalloc; /* If set by the page allocator, + * ALLOC_PFMEMALLOC was set + * and the low watermark was not + * met implying that the system + * is under some pressure. The + * caller should try ensure + * this page is only used to + * free other pages. + */ }; union { diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index c88d2a9451a..b5d13841604 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -7,6 +7,7 @@ #include <linux/types.h> #include <linux/bug.h> +#include <linux/mmdebug.h> #ifndef __GENERATING_BOUNDS_H #include <linux/mm_types.h> #include <generated/bounds.h> @@ -453,6 +454,34 @@ static inline int PageTransTail(struct page *page) } #endif +/* + * If network-based swap is enabled, sl*b must keep track of whether pages + * were allocated from pfmemalloc reserves. + */ +static inline int PageSlabPfmemalloc(struct page *page) +{ + VM_BUG_ON(!PageSlab(page)); + return PageActive(page); +} + +static inline void SetPageSlabPfmemalloc(struct page *page) +{ + VM_BUG_ON(!PageSlab(page)); + SetPageActive(page); +} + +static inline void __ClearPageSlabPfmemalloc(struct page *page) +{ + VM_BUG_ON(!PageSlab(page)); + __ClearPageActive(page); +} + +static inline void ClearPageSlabPfmemalloc(struct page *page) +{ + VM_BUG_ON(!PageSlab(page)); + ClearPageActive(page); +} + #ifdef CONFIG_MMU #define __PG_MLOCKED (1 << PG_mlocked) #else |