summaryrefslogtreecommitdiffstats
path: root/block/bfq-iosched.h
diff options
context:
space:
mode:
Diffstat (limited to 'block/bfq-iosched.h')
-rw-r--r--block/bfq-iosched.h25
1 files changed, 24 insertions, 1 deletions
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
index 584d3c9ed8ba..e80adf822bbe 100644
--- a/block/bfq-iosched.h
+++ b/block/bfq-iosched.h
@@ -357,6 +357,24 @@ struct bfq_queue {
/* max service rate measured so far */
u32 max_service_rate;
+
+ /*
+ * Pointer to the waker queue for this queue, i.e., to the
+ * queue Q such that this queue happens to get new I/O right
+ * after some I/O request of Q is completed. For details, see
+ * the comments on the choice of the queue for injection in
+ * bfq_select_queue().
+ */
+ struct bfq_queue *waker_bfqq;
+ /* node for woken_list, see below */
+ struct hlist_node woken_list_node;
+ /*
+ * Head of the list of the woken queues for this queue, i.e.,
+ * of the list of the queues for which this queue is a waker
+ * queue. This list is used to reset the waker_bfqq pointer in
+ * the woken queues when this queue exits.
+ */
+ struct hlist_head woken_list;
};
/**
@@ -533,6 +551,9 @@ struct bfq_data {
/* time of last request completion (ns) */
u64 last_completion;
+ /* bfqq owning the last completed rq */
+ struct bfq_queue *last_completed_rq_bfqq;
+
/* time of last transition from empty to non-empty (ns) */
u64 last_empty_occupied_ns;
@@ -743,7 +764,8 @@ enum bfqq_state_flags {
* update
*/
BFQQF_coop, /* bfqq is shared */
- BFQQF_split_coop /* shared bfqq will be split */
+ BFQQF_split_coop, /* shared bfqq will be split */
+ BFQQF_has_waker /* bfqq has a waker queue */
};
#define BFQ_BFQQ_FNS(name) \
@@ -763,6 +785,7 @@ BFQ_BFQQ_FNS(in_large_burst);
BFQ_BFQQ_FNS(coop);
BFQ_BFQQ_FNS(split_coop);
BFQ_BFQQ_FNS(softrt_update);
+BFQ_BFQQ_FNS(has_waker);
#undef BFQ_BFQQ_FNS
/* Expiration reasons. */