From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Andrew Lunn <andrew@lunn.ch>
Cc: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Simon Horman <horms@kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
Maxime Chevallier <maxime.chevallier@bootlin.com>,
TRINH THAI Florent <florent.trinh-thai@cs-soprasteria.com>,
CASAUBON Jean Michel <jean-michel.casaubon@cs-soprasteria.com>
Subject: Re: [PATCH net] net: sysfs: Fix deadlock situation in sysfs accesses
Date: Tue, 17 Dec 2024 17:18:40 +0100 [thread overview]
Message-ID: <c1d52a7d-b6b2-4150-99c7-a67b2a127a18@csgroup.eu> (raw)
In-Reply-To: <c0a07217-df63-4b5d-b1a5-13b386b0d7d7@lunn.ch>
Le 17/12/2024 à 16:30, Andrew Lunn a écrit :
> On Tue, Dec 17, 2024 at 08:18:25AM +0100, Christophe Leroy wrote:
>> The following problem is encountered on kernel built with
>> CONFIG_PREEMPT. An snmp daemon running with normal priority is
>> regularly calling ioctl(SIOCGMIIPHY).
>
> Why is an SNMP daemon using that IOCTL? What MAC driver is this? Is it
> using phylib? For phylib, that IOCTL is supposed to be for debug only,
> and is a bit of a foot gun. So i would not recommend it.
>
That's the well-known Net-SNMP package.
See for instance
https://github.com/net-snmp/net-snmp/blob/master/agent/mibgroup/if-mib/data_access/interface_linux.c#L954
The MAC is ucc_geth driver, it is phylib for the moment, it is being
converted to phylink in net-next , see commit 53036aa8d031 ("net:
freescale: ucc_geth: phylink conversion")
Christophe
next prev parent reply other threads:[~2024-12-17 16:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-17 7:18 Christophe Leroy
2024-12-17 8:16 ` Eric Dumazet
2024-12-17 8:59 ` Christophe Leroy
2024-12-17 9:20 ` Eric Dumazet
2024-12-17 9:41 ` Christophe Leroy
2024-12-17 9:52 ` Eric Dumazet
2024-12-17 11:56 ` Christophe Leroy
2024-12-17 12:04 ` Eric Dumazet
2024-12-17 15:30 ` Andrew Lunn
2024-12-17 16:18 ` Christophe Leroy [this message]
2024-12-17 16:59 ` Andrew Lunn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=c1d52a7d-b6b2-4150-99c7-a67b2a127a18@csgroup.eu \
--to=christophe.leroy@csgroup.eu \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=ebiederm@xmission.com \
--cc=edumazet@google.com \
--cc=florent.trinh-thai@cs-soprasteria.com \
--cc=horms@kernel.org \
--cc=jean-michel.casaubon@cs-soprasteria.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maxime.chevallier@bootlin.com \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®