netdev - Re: [iproute PATCHv2 0/2] Netns performance improvements

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Date:	Wed, 6 Jul 2016 21:22:57 -0700
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Phil Sutter <phil@....cc>
Cc:	Stephen Hemminger <shemming@...cade.com>,
	"Eric W . Biederman" <ebiederm@...ssion.com>,
	netdev@...r.kernel.org
Subject: Re: [iproute PATCHv2 0/2] Netns performance improvements

On Tue,  5 Jul 2016 16:51:18 +0200
Phil Sutter <phil@....cc> wrote:

> Stress-testing OpenStack Neutron revealed poor performance of 'ip netns'
> when dealing with a high amount of namespaces. The cause of this lies in
> the combination of how iproute2 mounts NETNS_RUN_DIR and the netns files
> therein and the fact that systemd makes all mount points of the system
> shared.
> 
> Changes since v1:
> - Added Suggested-by tag to patches.
> 
> Phil Sutter (2):
>   ipnetns: Move NETNS_RUN_DIR into it's own propagation group
>   ipnetns: Make netns mount points private
> 
>  ip/ipnetns.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
> 

I want an ack for Eric on this, it seems a little risky