[PATCH 4/4] f2fs: optimize build_free_nids()

[Haicheng Li]

When nm_i->fcnt > 2 * MAX_FREE_NIDS, stop scanning other NAT pages.

Signed-off-by: Haicheng Li <haicheng...@linux.intel.com>
---
 fs/f2fs/node.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 1fe3fe2..3136224 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1342,6 +1342,8 @@ static void build_free_nids(struct f2fs_sb_info *sbi)
                if (nid >= nm_i->max_nid)
                        nid = 0;
 
+               if (nm_i->fcnt > 2 * MAX_FREE_NIDS)
+                       break;
                if (i++ == FREE_NID_PAGES)
                        break;
        }
-- 
1.7.9.5

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