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authorMel Gorman <mgorman@suse.de>2014-06-04 16:10:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:54:09 -0700
commitdc4b0caff24d9b2918e9f27bc65499ee63187eba (patch)
treeae94a40e2da00a8b32c81c4451d42447b65d6e03 /include
parente58469bafd0524e848c3733bc3918d854595e20f (diff)
mm: page_alloc: reduce number of times page_to_pfn is called
In the free path we calculate page_to_pfn multiple times. Reduce that. Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: Rik van Riel <riel@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Jan Kara <jack@suse.cz> Cc: Michal Hocko <mhocko@suse.cz> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mmzone.h9
-rw-r--r--include/linux/pageblock-flags.h33
2 files changed, 20 insertions, 22 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 8ef1e3f71e0f..472426ac96ae 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -78,10 +78,15 @@ extern int page_group_by_mobility_disabled;
#define NR_MIGRATETYPE_BITS (PB_migrate_end - PB_migrate + 1)
#define MIGRATETYPE_MASK ((1UL << NR_MIGRATETYPE_BITS) - 1)
-static inline int get_pageblock_migratetype(struct page *page)
+#define get_pageblock_migratetype(page) \
+ get_pfnblock_flags_mask(page, page_to_pfn(page), \
+ PB_migrate_end, MIGRATETYPE_MASK)
+
+static inline int get_pfnblock_migratetype(struct page *page, unsigned long pfn)
{
BUILD_BUG_ON(PB_migrate_end - PB_migrate != 2);
- return get_pageblock_flags_mask(page, PB_migrate_end, MIGRATETYPE_MASK);
+ return get_pfnblock_flags_mask(page, pfn, PB_migrate_end,
+ MIGRATETYPE_MASK);
}
struct free_area {
diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index c08730c10c7a..2baeee12f48e 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -65,33 +65,26 @@ extern int pageblock_order;
/* Forward declaration */
struct page;
-unsigned long get_pageblock_flags_mask(struct page *page,
+unsigned long get_pfnblock_flags_mask(struct page *page,
+ unsigned long pfn,
unsigned long end_bitidx,
unsigned long mask);
-void set_pageblock_flags_mask(struct page *page,
+
+void set_pfnblock_flags_mask(struct page *page,
unsigned long flags,
+ unsigned long pfn,
unsigned long end_bitidx,
unsigned long mask);
/* Declarations for getting and setting flags. See mm/page_alloc.c */
-static inline unsigned long get_pageblock_flags_group(struct page *page,
- int start_bitidx, int end_bitidx)
-{
- unsigned long nr_flag_bits = end_bitidx - start_bitidx + 1;
- unsigned long mask = (1 << nr_flag_bits) - 1;
-
- return get_pageblock_flags_mask(page, end_bitidx, mask);
-}
-
-static inline void set_pageblock_flags_group(struct page *page,
- unsigned long flags,
- int start_bitidx, int end_bitidx)
-{
- unsigned long nr_flag_bits = end_bitidx - start_bitidx + 1;
- unsigned long mask = (1 << nr_flag_bits) - 1;
-
- set_pageblock_flags_mask(page, flags, end_bitidx, mask);
-}
+#define get_pageblock_flags_group(page, start_bitidx, end_bitidx) \
+ get_pfnblock_flags_mask(page, page_to_pfn(page), \
+ end_bitidx, \
+ (1 << (end_bitidx - start_bitidx + 1)) - 1)
+#define set_pageblock_flags_group(page, flags, start_bitidx, end_bitidx) \
+ set_pfnblock_flags_mask(page, flags, page_to_pfn(page), \
+ end_bitidx, \
+ (1 << (end_bitidx - start_bitidx + 1)) - 1)
#ifdef CONFIG_COMPACTION
#define get_pageblock_skip(page) \