f2fs: optimize scan_nat_page()
When nm_i->fcnt > 2 * MAX_FREE_NIDS, stop scanning other NAT entries.
Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
[Jaegeuk Kim: fix handling the return value of add_free_nid()]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 122200e..e42934e 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1254,7 +1254,7 @@
struct free_nid *i;
if (nm_i->fcnt > 2 * MAX_FREE_NIDS)
- return 0;
+ return -1;
/* 0 nid should not be used */
if (nid == 0)
@@ -1302,12 +1302,16 @@
i = start_nid % NAT_ENTRY_PER_BLOCK;
for (; i < NAT_ENTRY_PER_BLOCK; i++, start_nid++) {
+
if (start_nid >= nm_i->max_nid)
break;
- blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
+
+ blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
BUG_ON(blk_addr == NEW_ADDR);
- if (blk_addr == NULL_ADDR)
- add_free_nid(nm_i, start_nid);
+ if (blk_addr == NULL_ADDR) {
+ if (add_free_nid(nm_i, start_nid) < 0)
+ break;
+ }
}
}
@@ -1655,7 +1659,7 @@
}
if (nat_get_blkaddr(ne) == NULL_ADDR &&
- !add_free_nid(NM_I(sbi), nid)) {
+ add_free_nid(NM_I(sbi), nid) <= 0) {
write_lock(&nm_i->nat_tree_lock);
__del_from_nat_cache(nm_i, ne);
write_unlock(&nm_i->nat_tree_lock);