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Commit 33362399 authored by Yunlei He's avatar Yunlei He Committed by Jaegeuk Kim
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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: default avatarYunlei He <heyunlei@huawei.com>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 01bb5c8b

fs/f2fs/node.c

+6 −6
Original line number Diff line number Diff line
@@ -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) {

		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);

		}



		nid += (NAT_ENTRY_PER_BLOCK - (nid % NAT_ENTRY_PER_BLOCK));

		if (unlikely(nid >= nm_i->max_nid))