f2fs: remove unnecessary threshold

The NM_WOUT_THRESHOLD is now obsolete since f2fs starts to control on a basis
of the memory footprint.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index b7111c4..b52c12c 100644 (file)
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -250,10 +250,10 @@ static int stat_show(struct seq_file *s, void *v)
                           si->ndirty_dent, si->ndirty_dirs);
                seq_printf(s, "  - meta: %4d in %4d\n",
                           si->ndirty_meta, si->meta_pages);
-               seq_printf(s, "  - NATs: %5d > %lu\n",
-                          si->nats, NM_WOUT_THRESHOLD);
-               seq_printf(s, "  - SITs: %5d\n  - free_nids: %5d\n",
-                          si->sits, si->fnids);
+               seq_printf(s, "  - NATs: %9d\n  - SITs: %9d\n",
+                          si->nats, si->sits);
+               seq_printf(s, "  - free_nids: %9d\n",
+                          si->fnids);
                seq_puts(s, "\nDistribution of User Blocks:");
                seq_puts(s, " [ valid | invalid | free ]\n");
                seq_puts(s, "  [");

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index fec4967..daf644c 100644 (file)
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -224,7 +224,7 @@ int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
 {
        struct f2fs_nm_info *nm_i = NM_I(sbi);
 
-       if (available_free_memory(nm_i, NAT_ENTRIES) || nr_shrink <= 0)
+       if (available_free_memory(nm_i, NAT_ENTRIES))
                return 0;
 
        write_lock(&nm_i->nat_tree_lock);
@@ -1830,9 +1830,6 @@ flush_now:
        if (!flushed)
                mutex_unlock(&curseg->curseg_mutex);
        f2fs_put_page(page, 1);
-
-       /* 2) shrink nat caches if necessary */
-       try_to_free_nats(sbi, nm_i->nat_cnt - NM_WOUT_THRESHOLD);
 }
 
 static int init_node_manager(struct f2fs_sb_info *sbi)

diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index c972154..c2015b7 100644 (file)
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -20,9 +20,6 @@
 /* maximum readahead size for node during getting data blocks */
 #define MAX_RA_NODE            128
 
-/* maximum cached nat entries to manage memory footprint */
-#define NM_WOUT_THRESHOLD      (64 * NAT_ENTRY_PER_BLOCK)
-
 /* control the memory footprint threshold (10MB per 1GB ram) */
 #define DEF_RAM_THRESHOLD      10