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From: Fabio Estevam <festevam@gmail.com>
To: Kalle Valo <kvalo@codeaurora.org>,
	"Paul E . McKenney" <paulmck@kernel.org>
Cc: ath10k@lists.infradead.org, linux-mmc <linux-mmc@vger.kernel.org>,
	 Ulf Hansson <ulf.hansson@linaro.org>,
	Marek Vasut <marex@denx.de>
Subject: NOHZ tick-stop error with ath10k SDIO
Date: Wed, 18 Aug 2021 12:18:25 -0300	[thread overview]
Message-ID: <CAOMZO5AAvZic-NFbYYSVfOxY-27QukXMX68f9eDmhbqAkBRKRw@mail.gmail.com> (raw)

Hi,

When launching the hostapd application on a i.MX7 based board with an
ath10k device connected via SDIO, the following "NOHZ tick-stop error"
messages are seen:

# hostapd /etc/wifi.conf
Configuration file: /etc/wifi.conf
wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
[   63.021149] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
Using interface wlan0 with hwaddr 00:1f:7b:31:04:a0 and ssid "thessid"
[   67.332470] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan0: interface state COUNTRY_UPDATE->ENABLED
wlan0: AP-ENABLED
[   68.025845] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   69.025973] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   69.607432] cfg80211: failed to load regulatory.db
[   72.026748] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   73.027039] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   74.027159] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   75.027109] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   76.027461] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   77.027391] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   78.027560] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!

This happens on all kernel versions from 5.10  to 5.13.

Any ideas on how to fix this problem?

Thanks,

Fabio Estevam

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             reply	other threads:[~2021-08-18 15:18 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-18 15:18 Fabio Estevam [this message]
2021-08-18 15:43 ` Paul E. McKenney
2021-08-18 16:29   ` Fabio Estevam
2021-08-18 17:02     ` Fabio Estevam
2021-08-18 17:56       ` Paul E. McKenney
2021-08-19 13:24         ` Fabio Estevam
2021-09-02 21:51         ` Thomas Gleixner
2021-09-02 22:09           ` Paul E. McKenney
2021-09-03  8:07           ` Thomas Gleixner
2021-09-04 21:10             ` Fabio Estevam
2021-09-05 13:00               ` Thomas Gleixner
2021-09-05 13:07                 ` Fabio Estevam
2021-09-17 16:32   ` Qais Yousef
2021-09-17 17:09     ` Paul E. McKenney

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