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From: Xianting Tian <xianting_tian@126.com>
To: tj@kernel.org, axboe@kernel.dk
Cc: cgroups@vger.kernel.org, linux-block@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] blkcg: add plugging support for punt bio
Date: Thu,  6 Aug 2020 09:54:42 -0400	[thread overview]
Message-ID: <1596722082-31817-1-git-send-email-xianting_tian@126.com> (raw)

Try to merge continuous bio to current task's plug fisrt.

Signed-off-by: Xianting Tian <xianting_tian@126.com>
---
 block/blk-cgroup.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 0ecc897..fe5d361 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -122,6 +122,7 @@ static void blkg_async_bio_workfn(struct work_struct *work)
 					     async_bio_work);
 	struct bio_list bios = BIO_EMPTY_LIST;
 	struct bio *bio;
+	struct blk_plug plug;
 
 	/* as long as there are pending bios, @blkg can't go away */
 	spin_lock_bh(&blkg->async_bio_lock);
@@ -129,8 +130,10 @@ static void blkg_async_bio_workfn(struct work_struct *work)
 	bio_list_init(&blkg->async_bios);
 	spin_unlock_bh(&blkg->async_bio_lock);
 
+	blk_start_plug(&plug);
 	while ((bio = bio_list_pop(&bios)))
 		submit_bio(bio);
+	blk_finish_plug(&plug);
 }
 
 /**
-- 
1.8.3.1


             reply	other threads:[~2020-08-06 17:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-06 13:54 Xianting Tian [this message]
2020-08-06 14:30 ` [PATCH] blkcg: add plugging support for punt bio Tejun Heo
2020-08-06 14:30   ` Tejun Heo
2020-08-06 15:16 ` Jens Axboe
     [not found]   ` <42b939c2.e08.173c6f79af9.Coremail.xianting_tian@126.com>
     [not found]     ` <1ded6246.2c67.17458ce4300.Coremail.xianting_tian@126.com>
     [not found]       ` <65e1e040da644ed9a05edd166d06b5e3@h3c.com>
2020-09-08 18:03         ` Tejun Heo
2020-09-08 18:03           ` Tejun Heo
2020-09-09  1:22           ` Tianxianting
2020-09-09  1:22             ` Tianxianting

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