lkml.org 
[lkml]   [2020]   [Aug]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] blkcg: add plugging support for punt bio
Date
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
\
 
 \ /
  Last update: 2020-08-06 19:07    [W:0.056 / U:0.636 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site