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From: Dennis Zhou <dennisszhou@gmail.com>
To: Jens Axboe <axboe@kernel.dk>, Tejun Heo <tj@kernel.org>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Josef Bacik <josef@toxicpanda.com>
Cc: kernel-team@fb.com, linux-block@vger.kernel.org,
	cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Dennis Zhou (Facebook)" <dennisszhou@gmail.com>
Subject: [PATCH 05/12] blkcg: consolidate bio_issue_init to be a part of core
Date: Tue, 11 Sep 2018 14:41:30 -0400
Message-ID: <20180911184137.35897-6-dennisszhou@gmail.com> (raw)
In-Reply-To: <20180911184137.35897-1-dennisszhou@gmail.com>

From: "Dennis Zhou (Facebook)" <dennisszhou@gmail.com>

bio_issue_init among other things initializes the timestamp for an IO.
Rather than have this logic handled by policies, this consolidates it to
be on the init paths (normal, clone, bounce clone).

Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com>
---
 block/bio.c                | 2 ++
 block/blk-iolatency.c      | 2 --
 block/blk-throttle.c       | 8 --------
 block/bounce.c             | 2 ++
 include/linux/blk-cgroup.h | 9 +++++++++
 5 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index 97c1c4bf8df6..1d28d7ad2342 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -610,6 +610,8 @@ void __bio_clone_fast(struct bio *bio, struct bio *bio_src)
 	bio->bi_io_vec = bio_src->bi_io_vec;
 
 	bio_clone_blkcg_association(bio, bio_src);
+
+	blkcg_bio_issue_init(bio);
 }
 EXPORT_SYMBOL(__bio_clone_fast);
 
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index 79a7549e2062..9d7052bad6f7 100644
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -401,8 +401,6 @@ static void blkcg_iolatency_throttle(struct rq_qos *rqos, struct bio *bio,
 	if (!blk_iolatency_enabled(blkiolat))
 		return;
 
-	bio_issue_init(&bio->bi_issue, bio_sectors(bio));
-
 	while (blkg && blkg->parent) {
 		struct iolatency_grp *iolat = blkg_to_lat(blkg);
 		if (!iolat) {
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index b7b5cc4defc2..f2b355338894 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -2126,13 +2126,6 @@ static inline void throtl_update_latency_buckets(struct throtl_data *td)
 }
 #endif
 
-static void blk_throtl_assoc_bio(struct throtl_grp *tg, struct bio *bio)
-{
-#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
-	bio_issue_init(&bio->bi_issue, bio_sectors(bio));
-#endif
-}
-
 bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg,
 		    struct bio *bio)
 {
@@ -2156,7 +2149,6 @@ bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg,
 	if (unlikely(blk_queue_bypass(q)))
 		goto out_unlock;
 
-	blk_throtl_assoc_bio(tg, bio);
 	blk_throtl_update_idletime(tg);
 
 	sq = &tg->service_queue;
diff --git a/block/bounce.c b/block/bounce.c
index bc63b3a2d18c..7a08703b1204 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -259,6 +259,8 @@ static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask,
 
 	bio_clone_blkcg_association(bio, bio_src);
 
+	blkcg_bio_issue_init(bio);
+
 	return bio;
 }
 
diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 6e33ad1d92b4..a6b6e741a75e 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -897,6 +897,12 @@ static inline bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg
 				  struct bio *bio) { return false; }
 #endif
 
+
+static inline void blkcg_bio_issue_init(struct bio *bio)
+{
+	bio_issue_init(&bio->bi_issue, bio_sectors(bio));
+}
+
 static inline bool blkcg_bio_issue_check(struct request_queue *q,
 					 struct bio *bio)
 {
@@ -922,6 +928,8 @@ static inline bool blkcg_bio_issue_check(struct request_queue *q,
 		blkg_rwstat_add(&blkg->stat_ios, bio->bi_opf, 1);
 	}
 
+	blkcg_bio_issue_init(bio);
+
 	rcu_read_unlock();
 	return !throtl;
 }
@@ -1034,6 +1042,7 @@ static inline void blk_put_rl(struct request_list *rl) { }
 static inline void blk_rq_set_rl(struct request *rq, struct request_list *rl) { }
 static inline struct request_list *blk_rq_rl(struct request *rq) { return &rq->q->root_rl; }
 
+static inline void blkcg_bio_issue_init(struct bio *bio) { }
 static inline bool blkcg_bio_issue_check(struct request_queue *q,
 					 struct bio *bio) { return true; }
 
-- 
2.17.1


  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-11 18:41 [PATCH v3 00/12] block: always associate blkg and refcount cleanup Dennis Zhou
2018-09-11 18:41 ` [PATCH 01/12] blkcg: fix ref count issue with bio_blkcg using task_css Dennis Zhou
2018-09-11 18:41 ` [PATCH 02/12] blkcg: update blkg_lookup_create to do locking Dennis Zhou
2018-09-11 18:41 ` [PATCH 03/12] blkcg: convert blkg_lookup_create to find closest blkg Dennis Zhou
2018-09-11 23:50   ` Tejun Heo
2018-09-11 18:41 ` [PATCH 04/12] blkcg: always associate a bio with a blkg Dennis Zhou
2018-09-11 18:41 ` Dennis Zhou [this message]
2018-09-11 18:41 ` [PATCH 06/12] blkcg: associate a blkg for pages being evicted by swap Dennis Zhou
2018-09-11 18:41 ` [PATCH 07/12] blkcg: associate writeback bios with a blkg Dennis Zhou
2018-09-11 18:41 ` [PATCH 08/12] blkcg: remove bio->bi_css and instead use bio->bi_blkg Dennis Zhou
2018-09-11 18:41 ` [PATCH 09/12] blkcg: remove additional reference to the css Dennis Zhou
2018-09-11 23:51   ` Tejun Heo
2018-09-11 18:41 ` [PATCH 10/12] blkcg: cleanup and make blk_get_rl use blkg_lookup_create Dennis Zhou
2018-09-11 18:41 ` [PATCH 11/12] blkcg: change blkg reference counting to use percpu_ref Dennis Zhou
2018-09-11 18:41 ` [PATCH 12/12] blkcg: rename blkg_try_get to blkg_tryget Dennis Zhou
2018-09-21 20:56 ` [PATCH v3 00/12] block: always associate blkg and refcount cleanup Dennis Zhou
2018-09-22  2:29   ` Jens Axboe
  -- strict thread matches above, loose matches on Subject: below --
2018-09-06 21:10 [PATCH " Dennis Zhou
2018-09-06 21:10 ` [PATCH 05/12] blkcg: consolidate bio_issue_init to be a part of core Dennis Zhou
2018-09-07 19:18   ` Liu Bo

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