Btrfs: Use an array of pages in the extent buffers to reduce the cost of find_get_page

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index 4ef8bdd68348..d74a2b3e3b5d 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -62,6 +62,7 @@ struct extent_state {
         struct list_head list;
 };
 
+#define EXTENT_INLINE_PAGES 32
 struct extent_buffer {
         u64 start;
         unsigned long len;
@@ -69,13 +70,12 @@ struct extent_buffer {
         int flags;
         struct list_head list;
         struct list_head leak_list;
-        struct page *first_page;
-        struct page *last_page;
         unsigned long alloc_addr;
         char *map_token;
         char *kaddr;
         unsigned long map_start;
         unsigned long map_len;
+        struct page *pages[EXTENT_INLINE_PAGES];
 };
 
 typedef struct extent_map *(get_extent_t)(struct inode *inode,