cfq-iosched: document the cfqq flags
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 4c24986..975cdfc 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -162,15 +162,15 @@
};
enum cfqq_state_flags {
- CFQ_CFQQ_FLAG_on_rr = 0,
- CFQ_CFQQ_FLAG_wait_request,
- CFQ_CFQQ_FLAG_must_alloc,
- CFQ_CFQQ_FLAG_must_alloc_slice,
- CFQ_CFQQ_FLAG_must_dispatch,
- CFQ_CFQQ_FLAG_fifo_expire,
- CFQ_CFQQ_FLAG_idle_window,
- CFQ_CFQQ_FLAG_prio_changed,
- CFQ_CFQQ_FLAG_queue_new,
+ CFQ_CFQQ_FLAG_on_rr = 0, /* on round-robin busy list */
+ CFQ_CFQQ_FLAG_wait_request, /* waiting for a request */
+ CFQ_CFQQ_FLAG_must_alloc, /* must be allowed rq alloc */
+ CFQ_CFQQ_FLAG_must_alloc_slice, /* per-slice must_alloc flag */
+ CFQ_CFQQ_FLAG_must_dispatch, /* must dispatch, even if expired */
+ CFQ_CFQQ_FLAG_fifo_expire, /* FIFO checked in this slice */
+ CFQ_CFQQ_FLAG_idle_window, /* slice idling enabled */
+ CFQ_CFQQ_FLAG_prio_changed, /* task priority has changed */
+ CFQ_CFQQ_FLAG_queue_new, /* queue never been serviced */
};
#define CFQ_CFQQ_FNS(name) \
