linux-kernel - many "changed bandwidth, new config is" messages in the log

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Date:   Thu, 24 Nov 2016 16:07:24 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Johannes Berg <johannes.berg@...el.com>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: many "changed bandwidth, new config is" messages in the log

Hi,
I have only now managed to move to 4.9-rc5 (from 4.8) and started seeing
quite a lot of following messages
"
[  346.612211] wlan0: AP c0:4a:00:f1:48:f2 changed bandwidth, new config is 2472 MHz, width 1 (2472/0 MHz)
[  352.655929] wlan0: AP c0:4a:00:f1:48:f2 changed bandwidth, new config is 2472 MHz, width 2 (2462/0 MHz)
"

It always seems to be changing width from 1 -> 2 and back

$ dmesg | grep "changed bandwidth" | wc -l
42
in 13 minutes of uptime. I have noticed this came in via 30eb1dc2c430
("mac80211: properly track HT/VHT operation changes").

Is this something to be worried about?
-- 
Michal Hocko
SUSE Labs