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From:   Christian Zigotzky <chzigotzky@xenosoft.de>
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Subject: Re: Latest Git kernel: avahi-daemon[2410]: ioctl(): Inappropriate ioctl for device
Date:   Sat, 8 Feb 2020 07:59:17 +0100
Message-Id: <834D35CA-F0D5-43EC-97B2-2E97B4DA7703@xenosoft.de>
References: <CAK8P3a39L5i4aEbKe9CiW6unbioL=T8GqXC007mXxUu+_j84FA@mail.gmail.com>
Cc:     Michael Ellerman <mpe@ellerman.id.au>,
        Jakub Kicinski <kuba@kernel.org>,
        Christophe Leroy <christophe.leroy@c-s.fr>,
        DTML <devicetree@vger.kernel.org>,
        Darren Stevens <darren@stevens-zone.net>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linuxppc-dev@ozlabs.org, "contact@a-eon.com" <contact@a-eon.com>,
        "R.T.Dickinson" <rtd2@xtra.co.nz>, Christoph Hellwig <hch@lst.de>,
        mad skateman <madskateman@gmail.com>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
        Christian Zigotzky <info@xenosoft.de>
In-Reply-To: <CAK8P3a39L5i4aEbKe9CiW6unbioL=T8GqXC007mXxUu+_j84FA@mail.gmail.com>
To:     Arnd Bergmann <arnd@arndb.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


> On 7. Feb 2020, at 18:08, Arnd Bergmann <arnd@arndb.de> wrote:
>=20
> =EF=BB=BFOn Fri, Feb 7, 2020 at 3:34 PM Christian Zigotzky
> <chzigotzky@xenosoft.de> wrote:
>>=20
>> Hello Arnd,
>>=20
>> We regularly compile and test Linux kernels every day during the merge
>> window. Since Thursday last week we have very high CPU usage because of
>> the avahi daemon on our desktop Linux systems (Ubuntu, Debian etc). The
>> avahi daemon produces a lot of the following log message. This generates
>> high CPU usage.
>>=20
>> Error message: avahi-daemon[2410]: ioctl(): Inappropriate ioctl for devic=
e
>>=20
>> strace /usr/sbin/avahi-daemon:
>>=20
>=20
> Thanks a lot for the detailed analysis, with this I immediately saw
> what went wrong in my
> original commit and I sent you a fix. Please test to ensure that this
> correctly addresses
> the problem.
>=20
>        Arnd

Hi Arnd,

Thanks a lot for your patch! I will test it as soon as possible.

Cheers,
Christian=