From 33362399b3fc228f4c5af18c0946414745f42354 Mon Sep 17 00:00:00 2001 From: Yunlei He Date: Fri, 17 Nov 2017 16:13:38 +0800 Subject: [PATCH] f2fs: no need to read nat block if nat_block_bitmap is set No need to read nat block if nat_block_bitmap is set. Signed-off-by: Yunlei He Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/node.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 64c9b9050c4c..496e9b14e060 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; @@ -2056,10 +2053,13 @@ 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); + if (!test_bit_le(NAT_BLOCK_OFFSET(nid), + nm_i->nat_block_bitmap)) { + struct page *page = get_current_nat_page(sbi, nid); - scan_nat_page(sbi, page, nid); - f2fs_put_page(page, 1); + scan_nat_page(sbi, page, nid); + f2fs_put_page(page, 1); + } nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK)); if (unlikely(nid >= nm_i->max_nid)) -- 2.20.1