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f2fs: don't track newly allocated nat entry in list 

We will never persist newly allocated nat entries during checkpoint(), so
we don't need to track such nat entries in nat dirty list in order to
avoid:
- more latency during traversing dirty list;
- sorting nat sets incorrectly due to recording wrong entry_cnt in nat
entry set.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2017-06-05 18:29:08 +08:00 committed by Jaegeuk Kim
parent d9703d9097
commit febeca6d37
1 changed files with 10 additions and 6 deletions
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16
fs/f2fs/node.c
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@ -158,9 +158,6 @@ static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
struct nat_entry_set *head;
if (get_nat_flag(ne, IS_DIRTY))
return;
head = radix_tree_lookup(&nm_i->nat_set_root, set);
if (!head) {
head = f2fs_kmem_cache_alloc(nat_entry_set_slab, GFP_NOFS);
@ -171,10 +168,18 @@ static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
head->entry_cnt = 0;
f2fs_radix_tree_insert(&nm_i->nat_set_root, set, head);
}
list_move_tail(&ne->list, &head->entry_list);
if (get_nat_flag(ne, IS_DIRTY))
goto refresh_list;
nm_i->dirty_nat_cnt++;
head->entry_cnt++;
set_nat_flag(ne, IS_DIRTY, true);
refresh_list:
if (nat_get_blkaddr(ne) == NEW_ADDR)
list_del_init(&ne->list);
else
list_move_tail(&ne->list, &head->entry_list);
}
static void __clear_nat_cache_dirty(struct f2fs_nm_info *nm_i,
@ -2423,8 +2428,7 @@ static void __flush_nat_entry_set(struct f2fs_sb_info *sbi,
nid_t nid = nat_get_nid(ne);
int offset;
if (nat_get_blkaddr(ne) == NEW_ADDR)
continue;
f2fs_bug_on(sbi, nat_get_blkaddr(ne) == NEW_ADDR);
if (to_journal) {
offset = lookup_journal_in_cursum(journal,