Try to merge continuous bio to current task's plug fisrt.
Signed-off-by: Xianting Tian <[email protected]>
---
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
