This patch introduce free nid bitmap build during flush nat entries in order to reduce synchronous read in the process of build free nids.
Signed-off-by: Yunlei He <[email protected]> --- fs/f2fs/node.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index f202398..681552b 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1947,7 +1947,7 @@ static void remove_free_nid(struct f2fs_sb_info *sbi, nid_t nid) } static void scan_nat_page(struct f2fs_sb_info *sbi, - struct page *nat_page, nid_t start_nid) + struct page *nat_page, nid_t start_nid, bool in_build) { struct f2fs_nm_info *nm_i = NM_I(sbi); struct f2fs_nat_block *nat_blk = page_address(nat_page); @@ -1955,6 +1955,9 @@ 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; @@ -1966,7 +1969,8 @@ static void scan_nat_page(struct f2fs_sb_info *sbi, blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr); f2fs_bug_on(sbi, blk_addr == NEW_ADDR); if (blk_addr == NULL_ADDR) { - add_free_nid(sbi, start_nid, true, true); + if (in_build) + add_free_nid(sbi, start_nid, true, true); } else { spin_lock(&NM_I(sbi)->nid_list_lock); update_free_nid_bitmap(sbi, start_nid, false, true); @@ -2063,7 +2067,7 @@ static void __build_free_nids(struct f2fs_sb_info *sbi, bool sync, bool mount) nm_i->nat_block_bitmap)) { struct page *page = get_current_nat_page(sbi, nid); - scan_nat_page(sbi, page, nid); + scan_nat_page(sbi, page, nid, true); f2fs_put_page(page, 1); } @@ -2534,6 +2538,7 @@ static void __flush_nat_entry_set(struct f2fs_sb_info *sbi, if (to_journal) { up_write(&curseg->journal_rwsem); } else { + scan_nat_page(sbi, page, start_nid, false); __update_nat_bits(sbi, start_nid, page); f2fs_put_page(page, 1); } -- 1.9.1 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
