netdev - Re: [PATCH 0/7] Batched netns improvements.

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Date:	Thu, 03 Dec 2009 05:23:05 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	hadi@...erus.ca
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	Daniel Lezcano <dlezcano@...ibm.com>
Subject: Re: [PATCH 0/7] Batched netns improvements.

jamal <hadi@...erus.ca> writes:

> On Thu, 2009-12-03 at 04:27 -0800, Eric W. Biederman wrote:
>> This series of patches takes my simple 4k network namespace exit test
>> from about 44s to 1.6s, with a minuscule increase in code side.
>
> Nice.
> I will test these as soon as they make it into net-next (just easier
> for me given the setup).
> I should confirm that:
> The previous patches which are already in net-next from yesterday do
> improve performance to under 1 minute. Can we call that a several-factor
> improvement?;->
>
> Are you planning to give some tender loving to the virtual devices 
> as well (gre etc) or is that taken care of now you have a pernet batch
> exit op?

The tunnel devices gre, ipip, sit, ip6_tunnel, and the ethernet
bridging still need some tlc to give them rtnl_link_ops, and in
particular dellink operations so the deletions can be done in one big
batch.

The batch operations are mostly a generalization of a bunch of what
was already there.

I keep planning on doing something else and then I wind up working on
this.

Mostly what I have done turned out to be some very low hanging fruit,
and some general cleanups.

Eric

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