f2fs: introduce io_list for serialize data/node IOs
Serialize data/node IOs by using fifo list instead of mutex lock,
it will help to enhance concurrency of f2fs, meanwhile keeping LFS
IO semantics.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index b700766..d6af34d 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1983,6 +1983,8 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
init_rwsem(&sbi->write_io[i][j].io_rwsem);
sbi->write_io[i][j].sbi = sbi;
sbi->write_io[i][j].bio = NULL;
+ spin_lock_init(&sbi->write_io[i][j].io_lock);
+ INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
}
}