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It can be accessed and reviewed at: https://github.com/lxc/lxd/pull/6659

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=== Description (from pull-request) ===
Closes #6658.
Signed-off-by: Christian Brauner <christian.brau...@ubuntu.com>
From ac8e99439daaa88d8ae82f4bd793398babe69c68 Mon Sep 17 00:00:00 2001
From: Christian Brauner <christian.brau...@ubuntu.com>
Date: Wed, 25 Dec 2019 17:06:18 +0100
Subject: [PATCH] cgroups: detect blkio.bfq.weight knob

Closes #6658.
Signed-off-by: Christian Brauner <christian.brau...@ubuntu.com>
---
 lxd/cgroup/init.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lxd/cgroup/init.go b/lxd/cgroup/init.go
index 248c244b52..0bacbb45b2 100644
--- a/lxd/cgroup/init.go
+++ b/lxd/cgroup/init.go
@@ -370,6 +370,11 @@ func init() {
        val, ok := cgControllers["blkio"]
        if ok && val == V1 && 
shared.PathExists("/sys/fs/cgroup/blkio/blkio.weight") {
                cgControllers["blkio.weight"] = V1
+       } else {
+               val, ok := cgControllers["blkio"]
+               if ok && val == V1 && 
shared.PathExists("/sys/fs/cgroup/blkio/blkio.bfq.weight") {
+                       cgControllers["blkio.weight"] = V1
+               }
        }
 
        val, ok = cgControllers["memory"]
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