No need to read nat block if nat_block_bitmap is set.
Signed-off-by: Yunlei He <heyun...@huawei.com>
---
fs/f2fs/node.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index fe1fc66..7fd65928 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1949,9 +1949,6 @@ static void scan_nat_page(struct f2fs_sb_info *sbi,
unsigned int nat_ofs = NAT_BLOCK_OFFSET(start_nid);
int i;
- if (test_bit_le(nat_ofs, nm_i->nat_block_bitmap))
- return;
-
__set_bit_le(nat_ofs, nm_i->nat_block_bitmap);
i = start_nid % NAT_ENTRY_PER_BLOCK;
@@ -2056,11 +2053,16 @@ static void __build_free_nids(struct f2fs_sb_info *sbi,
bool sync, bool mount)
down_read(&nm_i->nat_tree_lock);
while (1) {
- struct page *page = get_current_nat_page(sbi, nid);
+ struct page *page;
+ if (test_bit_le(NAT_BLOCK_OFFSET(nid),
+ nm_i->nat_block_bitmap))
+ goto skip;
+
+ page = get_current_nat_page(sbi, nid);
scan_nat_page(sbi, page, nid);
f2fs_put_page(page, 1);
-
+skip:
nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK));
if (unlikely(nid >= nm_i->max_nid))
nid = 0;
--
1.9.1
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