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f2fs: reduce redundant spin_lock operations 

This patch reduces redundant spin_lock operations in alloc_nid_failed().
The alloc_nid_failed() does not need to delete entry and add one again
by triggering spin_lock and spin_unlock redundantly.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2013-04-03 22:19:03 +09:00
parent 1571f84a1f
commit 49952fa182
1 changed files with 11 additions and 6 deletions
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17
fs/f2fs/node.c
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@ -1407,10 +1407,8 @@ void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid)
spin_lock(&nm_i->free_nid_list_lock);
i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
if (i) {
BUG_ON(i->state != NID_ALLOC);
__del_from_free_nid_list(i);
}
BUG_ON(!i || i->state != NID_ALLOC);
__del_from_free_nid_list(i);
spin_unlock(&nm_i->free_nid_list_lock);
}
@ -1419,8 +1417,15 @@ void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid)
*/
void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid)
{
alloc_nid_done(sbi, nid);
add_free_nid(NM_I(sbi), nid);
struct f2fs_nm_info *nm_i = NM_I(sbi);
struct free_nid *i;
spin_lock(&nm_i->free_nid_list_lock);
i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
BUG_ON(!i || i->state != NID_ALLOC);
i->state = NID_NEW;
nm_i->fcnt++;
spin_unlock(&nm_i->free_nid_list_lock);
}
void recover_node_page(struct f2fs_sb_info *sbi, struct page *page,