mm: page_alloc: generalize the dirty balance reserve

[cascardo/linux.git] / include / linux / mmzone.h

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index e23a9e7..33bb1b1 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -195,11 +195,6 @@ static inline int is_active_lru(enum lru_list lru)
        return (lru == LRU_ACTIVE_ANON || lru == LRU_ACTIVE_FILE);
 }
 
-static inline int is_unevictable_lru(enum lru_list lru)
-{
-       return (lru == LRU_UNEVICTABLE);
-}
-
 struct zone_reclaim_stat {
        /*
         * The pageout code in vmscan.c keeps track of how many of the
@@ -361,10 +356,10 @@ struct zone {
        struct per_cpu_pageset __percpu *pageset;
 
        /*
-        * This is a per-zone reserve of pages that should not be
-        * considered dirtyable memory.
+        * This is a per-zone reserve of pages that are not available
+        * to userspace allocations.
         */
-       unsigned long           dirty_balance_reserve;
+       unsigned long           totalreserve_pages;
 
 #ifndef CONFIG_SPARSEMEM
        /*
@@ -576,19 +571,17 @@ static inline bool zone_is_empty(struct zone *zone)
 /* Maximum number of zones on a zonelist */
 #define MAX_ZONES_PER_ZONELIST (MAX_NUMNODES * MAX_NR_ZONES)
 
+enum {
+       ZONELIST_FALLBACK,      /* zonelist with fallback */
 #ifdef CONFIG_NUMA
-
-/*
- * The NUMA zonelists are doubled because we need zonelists that restrict the
- * allocations to a single node for __GFP_THISNODE.
- *
- * [0] : Zonelist with fallback
- * [1] : No fallback (__GFP_THISNODE)
- */
-#define MAX_ZONELISTS 2
-#else
-#define MAX_ZONELISTS 1
+       /*
+        * The NUMA zonelists are doubled because we need zonelists that
+        * restrict the allocations to a single node for __GFP_THISNODE.
+        */
+       ZONELIST_NOFALLBACK,    /* zonelist without fallback (__GFP_THISNODE) */
 #endif
+       MAX_ZONELISTS
+};
 
 /*
  * This struct contains information about a zone in a zonelist. It is stored
@@ -1207,13 +1200,13 @@ unsigned long __init node_memmap_size_bytes(int, unsigned long, unsigned long);
  * the zone and PFN linkages are still valid. This is expensive, but walkers
  * of the full memmap are extremely rare.
  */
-int memmap_valid_within(unsigned long pfn,
+bool memmap_valid_within(unsigned long pfn,
                                        struct page *page, struct zone *zone);
 #else
-static inline int memmap_valid_within(unsigned long pfn,
+static inline bool memmap_valid_within(unsigned long pfn,
                                        struct page *page, struct zone *zone)
 {
-       return 1;
+       return true;
 }
 #endif /* CONFIG_ARCH_HAS_HOLES_MEMORYMODEL */