linux-kernel - Re: [PATCH 19/24] net, diet: Make RPS configurable

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Message-ID: <87oazbux30.fsf@nemi.mork.no>
Date:	Tue, 06 May 2014 10:32:03 +0200
From:	Bjørn Mork <bjorn@...k.no>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	tom.zanussi@...ux.intel.com, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 19/24] net, diet: Make RPS configurable

Andi Kleen <andi@...stfloor.org> writes:

> From: Andi Kleen <ak@...ux.intel.com>
>
> Multiple receive queues are not needed on small systems,
> so allow disabling them.
>
> This is already disabled with !SMP, but it also makes
> sense to disable on very small SMP systems (like
> dual core SOC)

Such a pointless design still doesn't mean that you *have* to enable
SMP, does it?  How much would you save all over the kernel by simply
disabling SMP?

As for the system design: It seems to me that it would be more useful to
replace one of the CPU cores with some RAM...


Bjørn
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