直辖变量：
| vfs.altbufferflushes | |||
| vfs.bdwriteskip | |||
| vfs.bufdefragcnt | |||
| vfs.buffreekvacnt | |||
| vfs.bufmallocspace | |||
| vfs.bufreusecnt | |||
| vfs.bufspace | |||
| vfs.conflist | |||
| vfs.ctl | |||
| vfs.dirtybufferflushes | |||
| vfs.dirtybufthresh | |||
| vfs.flushwithdeps | |||
| vfs.freevnodes | |||
| vfs.getnewbufcalls | |||
| vfs.getnewbufrestarts | |||
| vfs.hibufspace | |||
| vfs.hidirtybuffers | |||
| vfs.hifreebuffers | |||
| vfs.hirunningspace | |||
| vfs.lobufspace | |||
| vfs.lodirtybuffers | |||
| vfs.lofreebuffers | |||
| vfs.lookup_shared | |||
| vfs.lorunningspace | |||
| vfs.maxbufspace | |||
| vfs.maxmallocbufspace | |||
| vfs.numdirtybuffers | |||
| vfs.numfreebuffers | |||
| vfs.numvnodes | |||
| vfs.read_max | |||
| vfs.reassignbufcalls | |||
| vfs.recursiveflushes | |||
| vfs.runningbufspace | |||
| vfs.timestamp_precision | |||
| vfs.usermount | |||
| vfs.vmiodirenable | |||
| vfs.wantfreevnodes | |||
| vfs.worklist_len | |||
| vfs.write_behind |
子树：