netdev - Re: [RFC][PATCH] iproute: Faster ip link add, set and delete

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Message-ID: <87vc8cnq6v.fsf@xmission.com>
Date:	Wed, 27 Mar 2013 20:44:40 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Serge Hallyn <serge.hallyn@...ntu.com>
Cc:	Stephen Hemminger <stephen@...workplumber.org>,
	Benoit Lourdelet <blourdel@...iper.net>,
	"netdev\@vger.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [RFC][PATCH] iproute: Faster ip link add, set and delete

Serge Hallyn <serge.hallyn@...ntu.com> writes:

> Quoting Eric W. Biederman (ebiederm@...ssion.com):
>> Stephen Hemminger <stephen@...workplumber.org> writes:
>> 
>> > If you need to do lots of operations the --batch mode will be significantly faster.
>> > One command start and one link map.
>> 
>> The problem in this case as I understand it is lots of independent
>> operations. Now maybe lxc should not shell out to ip and perform the
>> work itself.
>
> fwiw lxc uses netlink to create new veths, and picks random names with
> mktemp() ahead of time.

I am puzzled where does the slownes in iproute2 come into play?

Eric
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