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Date:   Tue, 23 Aug 2022 12:27:48 -0700
From:   Jakub Kicinski <kuba@kernel.org>
To:     =?UTF-8?B?SmFyb3PFgmF3IEvFgm9wb3Rlaw==?= <jkl@interduo.pl>
Cc:     netdev@vger.kernel.org
Subject: Re: Network interface - allow to set kernel default qlen value
Message-ID: <20220823122748.50cd9756@kernel.org>
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On Tue, 23 Aug 2022 09:59:07 +0200 Jaros=C5=82aw K=C5=82opotek wrote:
> W dniu 23.08.2022 o=C2=A002:36, Jakub Kicinski pisze:
> > On Mon, 22 Aug 2022 10:41:40 +0200 Jaros=C5=82aw K=C5=82opotek wrote: =
=20
> >> Welcome netdev's,
> >> is it possible to set in kernel default (for example by sysctl) value =
of
> >> qlen parameter for network interfaces?
> >>
> >> I try to search: sysctl -a | grep qlen | grep default
> >> and didn't find anything.
> >>
> >> Now for setting the qlen - we use scripts in /etc/network/interface.
> >>
> >> This is not so important thing - but could be improved. What do You
> >> think about it? =20
> > What type of network interfaces are we talking about here?
> > Physical Ethernet links? =20
>=20
> Ethernet links - for example:
>=20
> ip a s | grep qlen
>=20
> for example:
> 119: ens16np0.1231@ens16np0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500=20
> qdisc noqueue state UP group default qlen 10000

That looks like a vlan, or some such. I don't think changing qlen with
"noqueue" does anything.