netdev - Re: [RFC PATCH 00/12] RCU'ify the net:sched classifier chains

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Message-ID: <52D29F4C.90808@mojatatu.com>
Date:	Sun, 12 Jan 2014 08:57:32 -0500
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	John Fastabend <john.fastabend@...il.com>,
	xiyou.wangcong@...il.com, eric.dumazet@...il.com
CC:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [RFC PATCH 00/12] RCU'ify the net:sched classifier chains

On 01/12/14 08:28, Jamal Hadi Salim wrote:

> I will scan through the patches...
>

I looked and here's a general question:
Does even using RCU make any sense here? What we have
is a lot of updates and very very little reads (reads essentially
are done from the control side; the data path is is all about updates).

I am not sure if RCU is a win in such a case - it could make things
worse. At least that used to be the Truth(tm) many moons back.
Is that not the case anymore?

cheers,
jamal

> This is fun stuff - I will try to participate whenever i can
> (unfortunately not much time at the moment).
>

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