From: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
To: eric.dumazet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
stephen-OTpzqLSitTUnbdJkjeBofR2eb7JE58TQ@public.gmane.org,
linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org,
selinux-+05T5uksL2qpZYMLLGbcSA@public.gmane.org
Subject: Re: [PATCH] net: don't unnecessarily load kernel modules in dev_ioctl()
Date: Thu, 08 Mar 2018 13:11:15 -0500 (EST) [thread overview]
Message-ID: <20180308.131115.611191617522587758.davem@davemloft.net> (raw)
In-Reply-To: <c2d378b6-80b3-d9e1-7087-95f143875067-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
From: Eric Dumazet <eric.dumazet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Date: Thu, 8 Mar 2018 10:05:12 -0800
> Another problematic legacy behavior is the automatic creation of
> fallback tunnels, which hurts netns creation/deletion.
>
> Some environments want to create a netns for every job/task, and they
> do not care if the init netns has these tunnels or not.
>
> We have a local patch adding yet another knob to control this, since
> it saves a lot of cpu cycles (about 10ms per netns create/delete pair
> here)
Yeah, understood. At small scale the current behavior maybe made
sense, but these days it really doesn't.
No objections to the knob if you want to submit it.
next prev parent reply other threads:[~2018-03-08 18:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 22:27 [PATCH] net: don't unnecessarily load kernel modules in dev_ioctl() Paul Moore
2018-03-06 22:32 ` Paul Moore
[not found] ` <CAHC9VhR4FzwsAEO9O9Pnpkm2jOBajwZUkn_i0FqOMR_4ycag2g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-03-07 20:13 ` David Miller
2018-03-06 23:59 ` Stephen Hemminger
2018-03-07 13:46 ` Paul Moore
2018-03-08 17:34 ` David Miller
[not found] ` <20180308.123440.2224695014753871221.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2018-03-08 18:05 ` Eric Dumazet
[not found] ` <c2d378b6-80b3-d9e1-7087-95f143875067-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2018-03-08 18:11 ` David Miller [this message]
[not found] ` <20180308.131115.611191617522587758.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2018-03-08 20:53 ` Eric Dumazet
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