Merge tag 'samsung-fixes-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / fs / f2fs / node.h

diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 1f4f9d4..fc76845 100644 (file)
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -15,18 +15,21 @@
 #define        NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK)
 
 /* # of pages to perform synchronous readahead before building free nids */
-#define FREE_NID_PAGES 4
+#define FREE_NID_PAGES 8
+#define MAX_FREE_NIDS  (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES)
 
-#define DEF_RA_NID_PAGES       4       /* # of nid pages to be readaheaded */
+#define DEF_RA_NID_PAGES       0       /* # of nid pages to be readaheaded */
 
 /* maximum readahead size for node during getting data blocks */
 #define MAX_RA_NODE            128
 
 /* control the memory footprint threshold (10MB per 1GB ram) */
-#define DEF_RAM_THRESHOLD      10
+#define DEF_RAM_THRESHOLD      1
 
 /* control dirty nats ratio threshold (default: 10% over max nid count) */
 #define DEF_DIRTY_NAT_RATIO_THRESHOLD          10
+/* control total # of nats */
+#define DEF_NAT_CACHE_THRESHOLD                        100000
 
 /* vector size for gang look-up from nat cache that consists of radix tree */
 #define NATVEC_SIZE    64
@@ -126,6 +129,11 @@ static inline bool excess_dirty_nats(struct f2fs_sb_info *sbi)
                                        NM_I(sbi)->dirty_nats_ratio / 100;
 }
 
+static inline bool excess_cached_nats(struct f2fs_sb_info *sbi)
+{
+       return NM_I(sbi)->nat_cnt >= DEF_NAT_CACHE_THRESHOLD;
+}
+
 enum mem_type {
        FREE_NIDS,      /* indicates the free nid list */
        NAT_ENTRIES,    /* indicates the cached nat entry */