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[v3,12/14] bfq: disable merging between different groups under better_fairness

Message ID d31d9a4bc5705adc0b6669b48470fcaabf55074a.1616649216.git.brookxu@tencent.com (mailing list archive)
State New, archived
Headers show
Series bfq: introduce bfq.ioprio for cgroup | expand

Commit Message

brookxu March 25, 2021, 6:57 a.m. UTC
From: Chunguang Xu <brookxu@tencent.com>

In order to better guarantee the Qos for each group, we do not
allow queues of different groups to be merged.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
 block/bfq-iosched.c | 3 +++
 1 file changed, 3 insertions(+)
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diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 5aa9c2c..f4a99f9 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -2665,6 +2665,9 @@  static bool bfq_may_be_close_cooperator(struct bfq_queue *bfqq,
 	if (!bfq_bfqq_sync(bfqq) || !bfq_bfqq_sync(new_bfqq))
 		return false;
+	if (!bfq_bfqq_may_inject(bfqq, new_bfqq))
+		return false;
 	return true;