netdev - Re: [PATCH v7 00/11] Stop monitoring disabled devices

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Date:   Wed, 1 Jul 2020 16:25:49 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Andrzej Pietrasiewicz <andrzej.p@...labora.com>,
        linux-pm@...r.kernel.org, linux-acpi@...r.kernel.org,
        netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
        platform-driver-x86@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org,
        linux-rockchip@...ts.infradead.org
Cc:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Vishal Kulkarni <vishal@...lsio.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jiri Pirko <jiri@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Peter Kaestle <peter@...e.net>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Sebastian Reichel <sre@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Amit Kucheria <amit.kucheria@...durent.com>,
        Support Opensource <support.opensource@...semi.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Niklas Söderlund <niklas.soderlund@...natech.se>,
        Heiko Stuebner <heiko@...ech.de>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Allison Randal <allison@...utok.net>,
        Enrico Weigelt <info@...ux.net>,
        Gayatri Kammela <gayatri.kammela@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        kernel@...labora.com
Subject: Re: [PATCH v7 00/11] Stop monitoring disabled devices

On 01/07/2020 12:23, Andrzej Pietrasiewicz wrote:
> Hi,
> 

[ ... ]

>>>>
>>>> I did reproduce:
>>>>
>>>> v5.8-rc3 + series => imx6 hang at boot time
>>>> v5.8-rc3 => imx6 boots correctly
>>>>
> 
> What did you reproduce? Timeout logging in to the test system or a
> "real" failure of a test?

Timeout logging. Boot hangs.

>>> I kindly ask for a bisect.
>>
>> I will give a try but it is a very long process as the board is running
>> on kernelci.
>>
>> I was not able to reproduce it on imx7 despite it is the same sensor :/
>>
>>
> 
> Could it be that the thermal sensors somehow contribute to entropy and
> after
> the series is applied on some machines it takes more time to gather enough
> entropy?

I assume you are talking about the entropy for random?

It would be really surprising if it is the case. The message appears
asynchronously, I believe the boot flow is stuck in a mutex.


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