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authorJaegeuk Kim <jaegeuk@kernel.org>2014-12-03 21:15:10 -0800
committerJaegeuk Kim <jaegeuk@kernel.org>2014-12-03 21:23:29 -0800
commit8b26ef98da3387eb57a8a5c1747c6e628948ee0c (patch)
tree3a36e9ee3b1483c049a91e32f7eda6e54f71e0fc /fs/f2fs/f2fs.h
parent4634d71ed190c99e42ebee450f9a6897d20ee22c (diff)
f2fs: use rw_semaphore for nat entry lock
Previoulsy, we used rwlock for nat_entry lock. But, now we have a lot of complex operations in set_node_addr. (e.g., allocating kernel memories, handling radix_trees, and so on) So, this patches tries to change spinlock to rw_semaphore to give CPUs to other threads. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/f2fs.h')
-rw-r--r--fs/f2fs/f2fs.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index d04281319dbe..c87314099d26 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -332,7 +332,7 @@ struct f2fs_nm_info {
/* NAT cache management */
struct radix_tree_root nat_root;/* root of the nat entry cache */
struct radix_tree_root nat_set_root;/* root of the nat set cache */
- rwlock_t nat_tree_lock; /* protect nat_tree_lock */
+ struct rw_semaphore nat_tree_lock; /* protect nat_tree_lock */
struct list_head nat_entries; /* cached nat entry list (clean) */
unsigned int nat_cnt; /* the # of cached nat entries */
unsigned int dirty_nat_cnt; /* total num of nat entries in set */