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Date: Wed, 29 May 2013 21:52:16 +0300
Message-ID: <CAJZOPZLC=drE9dTpnj2hLdDmfnL+T4gOU1j1xYwbmYy-J9HaAQ@mail.gmail.com>
Subject: Re: [PATCH v6 net-next 2/5] net: implement support for low latency
 socket polling
From: Or Gerlitz <or.gerlitz@gmail.com>
To: Eliezer Tamir <eliezer.tamir@linux.intel.com>
Cc: Eric Dumazet <erdnetdev@gmail.com>, David Miller <davem@davemloft.net>,
        linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        Jesse Brandeburg <jesse.brandeburg@intel.com>,
        Don Skidmore <donald.c.skidmore@intel.com>,
        e1000-devel@lists.sourceforge.net,
        Willem de Bruijn <willemb@google.com>,
        Andi Kleen <andi@firstfloor.org>, HPA <hpa@zytor.com>,
        Eilon Greenstien <eilong@broadcom.com>,
        Alex Rosenbaum <alexr@mellanox.com>,
        Eliezer Tamir <eliezer@tamir.org.il>
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Eliezer Tamir <eliezer.tamir@linux.intel.com> wrote:
> Or Gerlitz wrote:

>> Unlike with TCP sockets, UDP sockets may receive packets from multiple
>> sources and hence the receiving context may be steered to be executed
>> on different cores through RSS or other Flow-Steering HW mechanisms
>> which could mean different napi contexts for the same socket, is that
>> a problem here? what's the severity?

> Nothing will break if you poll on the wrong queue.
> Your data will come through normal NAPI processing of the right queue.

Can you elaborate a little further, why you call this "wrong" and "right"?
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