From b3582c68920105e29d219714d8a6fbde25a43379 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Thu, 3 Jul 2014 18:58:39 +0800 Subject: f2fs: reduce competition among node page writes We do not need to block on ->node_write among different node page writers e.g. fsync/flush, unless we have a node page writer from write_checkpoint. So it's better use rw_semaphore instead of mutex type for ->node_write to promote performance. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/f2fs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/f2fs/f2fs.h') diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 80c78695546d..99425675c2f8 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -452,7 +452,7 @@ struct f2fs_sb_info { struct inode *meta_inode; /* cache meta blocks */ struct mutex cp_mutex; /* checkpoint procedure lock */ struct rw_semaphore cp_rwsem; /* blocking FS operations */ - struct mutex node_write; /* locking node writes */ + struct rw_semaphore node_write; /* locking node writes */ struct mutex writepages; /* mutex for writepages() */ bool por_doing; /* recovery is doing or not */ wait_queue_head_t cp_wait; -- cgit v1.2.3