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authorLinus Torvalds <torvalds@linux-foundation.org>2021-09-06 10:06:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-06 10:06:26 -0700
commit1dbe7e386f505bdae30f7436c41769149c7dcf32 (patch)
treea18108c84322f4453872823fadeaf6c00e6351cd /block
parent03085b3d5a45a60061423ac4857f339c7cb260ff (diff)
parent1c500ad706383f1a6609e63d0b5d1723fd84dab9 (diff)
Merge tag 'block-5.15-2021-09-05' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe: "Was going to send this one in later this week, but given that -Werror is now enabled (or at least available), the mq-deadline fix really should go in for the folks hitting that. - Ensure dd_queued() is only there if needed (Geert) - Fix a kerneldoc warning for bio_alloc_kiocb() - BFQ fix for queue merging - loop locking fix (Tetsuo)" * tag 'block-5.15-2021-09-05' of git://git.kernel.dk/linux-block: loop: reduce the loop_ctl_mutex scope bio: fix kerneldoc documentation for bio_alloc_kiocb() block, bfq: honor already-setup queue merges block/mq-deadline: Move dd_queued() to fix defined but not used warning
Diffstat (limited to 'block')
-rw-r--r--block/bfq-iosched.c16
-rw-r--r--block/bio.c2
-rw-r--r--block/mq-deadline.c12
3 files changed, 20 insertions, 10 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 480e1a134859..dd13c2bbc29c 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -2662,6 +2662,15 @@ bfq_setup_merge(struct bfq_queue *bfqq, struct bfq_queue *new_bfqq)
* are likely to increase the throughput.
*/
bfqq->new_bfqq = new_bfqq;
+ /*
+ * The above assignment schedules the following redirections:
+ * each time some I/O for bfqq arrives, the process that
+ * generated that I/O is disassociated from bfqq and
+ * associated with new_bfqq. Here we increases new_bfqq->ref
+ * in advance, adding the number of processes that are
+ * expected to be associated with new_bfqq as they happen to
+ * issue I/O.
+ */
new_bfqq->ref += process_refs;
return new_bfqq;
}
@@ -2724,6 +2733,10 @@ bfq_setup_cooperator(struct bfq_data *bfqd, struct bfq_queue *bfqq,
{
struct bfq_queue *in_service_bfqq, *new_bfqq;
+ /* if a merge has already been setup, then proceed with that first */
+ if (bfqq->new_bfqq)
+ return bfqq->new_bfqq;
+
/*
* Check delayed stable merge for rotational or non-queueing
* devs. For this branch to be executed, bfqq must not be
@@ -2825,9 +2838,6 @@ bfq_setup_cooperator(struct bfq_data *bfqd, struct bfq_queue *bfqq,
if (bfq_too_late_for_merging(bfqq))
return NULL;
- if (bfqq->new_bfqq)
- return bfqq->new_bfqq;
-
if (!io_struct || unlikely(bfqq == &bfqd->oom_bfqq))
return NULL;
diff --git a/block/bio.c b/block/bio.c
index e16849f46b0e..5df3dd282e40 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1688,7 +1688,7 @@ EXPORT_SYMBOL(bioset_init_from_src);
/**
* bio_alloc_kiocb - Allocate a bio from bio_set based on kiocb
* @kiocb: kiocb describing the IO
- * @nr_iovecs: number of iovecs to pre-allocate
+ * @nr_vecs: number of iovecs to pre-allocate
* @bs: bio_set to allocate from
*
* Description:
diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index 3c3693c34f06..7f3c3932b723 100644
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -270,12 +270,6 @@ deadline_move_request(struct deadline_data *dd, struct dd_per_prio *per_prio,
deadline_remove_request(rq->q, per_prio, rq);
}
-/* Number of requests queued for a given priority level. */
-static u32 dd_queued(struct deadline_data *dd, enum dd_prio prio)
-{
- return dd_sum(dd, inserted, prio) - dd_sum(dd, completed, prio);
-}
-
/*
* deadline_check_fifo returns 0 if there are no expired requests on the fifo,
* 1 otherwise. Requires !list_empty(&dd->fifo_list[data_dir])
@@ -953,6 +947,12 @@ static int dd_async_depth_show(void *data, struct seq_file *m)
return 0;
}
+/* Number of requests queued for a given priority level. */
+static u32 dd_queued(struct deadline_data *dd, enum dd_prio prio)
+{
+ return dd_sum(dd, inserted, prio) - dd_sum(dd, completed, prio);
+}
+
static int dd_queued_show(void *data, struct seq_file *m)
{
struct request_queue *q = data;