netdev - Re: [RFC PATCH] net, rps: bypass enqueue_to

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Message-ID: <1387376770.19078.314.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Wed, 18 Dec 2013 06:26:10 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Zhi Yong Wu <zwu.kernel@...il.com>
Cc:	Tom Herbert <therbert@...gle.com>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com>
Subject: Re: [RFC PATCH] net, rps: bypass enqueue_to_backlog()

On Wed, 2013-12-18 at 22:11 +0800, Zhi Yong Wu wrote:

> it makes sense, but if cpu < 0, some packets seems to bypass the flow
> shedding stuff, That is, the flow limit will be not so accurate,
> right?

Not sure what you mean.

cpu = -1 on very rare occasions, like cpu hot unplug.

In netif_receive_skb(), we just process the packet normally.


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