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f2fs: don't track new nat entry in nat set

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Nat entry set is used only in checkpoint(), and during checkpoint() we
won't flush new nat entry with unallocated address, so we don't need to
add new nat entry into nat set, then nat_entry_set::entry_cnt can
indicate actual entry count we need to flush in checkpoint().

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2018-03-20 23:08:30 +08:00 committed by Jaegeuk Kim
parent df033caf51
commit 780de47cf6
2 changed files with 26 additions and 4 deletions
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29
fs/f2fs/node.c
View file

@ -193,8 +193,8 @@ static void __del_from_nat_cache(struct f2fs_nm_info *nm_i, struct nat_entry *e)
__free_nat_entry(e);
}
static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
struct nat_entry *ne)
static struct nat_entry_set *__grab_nat_entry_set(struct f2fs_nm_info *nm_i,
struct nat_entry *ne)
{
nid_t set = NAT_BLOCK_OFFSET(ne->ni.nid);
struct nat_entry_set *head;
@ -209,15 +209,36 @@ 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);
}
return head;
}
static void __set_nat_cache_dirty(struct f2fs_nm_info *nm_i,
struct nat_entry *ne)
{
struct nat_entry_set *head;
bool new_ne = nat_get_blkaddr(ne) == NEW_ADDR;
if (!new_ne)
head = __grab_nat_entry_set(nm_i, ne);
/*
* update entry_cnt in below condition:
* 1. update NEW_ADDR to valid block address;
* 2. update old block address to new one;
*/
if (!new_ne && (get_nat_flag(ne, IS_PREALLOC) ||
!get_nat_flag(ne, IS_DIRTY)))
head->entry_cnt++;
set_nat_flag(ne, IS_PREALLOC, new_ne);
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)
if (new_ne)
list_del_init(&ne->list);
else
list_move_tail(&ne->list, &head->entry_list);

1
fs/f2fs/node.h
View file

@ -44,6 +44,7 @@ enum {
HAS_FSYNCED_INODE, /* is the inode fsynced before? */
HAS_LAST_FSYNC, /* has the latest node fsync mark? */
IS_DIRTY, /* this nat entry is dirty? */
IS_PREALLOC, /* nat entry is preallocated */
};
/*