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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Pekka Riikonen <priikone@iki.fi>
Cc: Eliezer Tamir <eliezer.tamir@linux.intel.com>,
	Dave 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>,
	Eliezer Tamir <eliezer@tamir.org.il>
Subject: Re: [PATCH v3 net-next 1/4] net: implement support for low latency socket polling
Date: Tue, 21 May 2013 10:48:19 -0700	[thread overview]
Message-ID: <1369158499.3301.236.camel@edumazet-glaptop> (raw)
In-Reply-To: <alpine.GSO.2.00.1305211855120.9230@git.silcnet.org>

On Tue, 2013-05-21 at 19:02 +0200, Pekka Riikonen wrote:

> Maybe even that's not needed.  Couldn't skb->queue_mapping give the 
> correct NAPI instance in multiqueue nics?  The NAPI instance could be made 
> easily available from skb->dev.  In any case an index is much better than 
> a new pointer.

We do not keep skb->dev information once a packet leaves the rcu
protected region.

Once packet is queued to tcp input queues, skb->dev is NULL.




  reply	other threads:[~2013-05-21 17:48 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-20 10:15 [PATCH v3 net-next 0/4] net: low latency Ethernet device polling Eliezer Tamir
2013-05-20 10:15 ` Eliezer Tamir
2013-05-20 10:16 ` [PATCH v3 net-next 1/4] net: implement support for low latency socket polling Eliezer Tamir
2013-05-20 10:16   ` Eliezer Tamir
2013-05-20 15:29   ` Eric Dumazet
2013-05-20 19:40     ` David Miller
2013-05-21  7:28     ` Eliezer Tamir
2013-05-21 13:28       ` Eric Dumazet
2013-05-21 17:02         ` Pekka Riikonen
2013-05-21 17:48           ` Eric Dumazet [this message]
2013-05-21 17:51             ` Eric Dumazet
2013-05-21 17:51               ` Eric Dumazet
2013-05-21 19:25               ` Eliezer Tamir
2013-05-21 19:25                 ` Eliezer Tamir
2013-05-21 19:29                 ` Eric Dumazet
2013-05-21 19:29                   ` Eric Dumazet
2013-05-21 18:49           ` David Miller
2013-05-21 19:31             ` Pekka Riikonen
2013-05-21 19:31               ` Pekka Riikonen
2013-05-20 10:16 ` [PATCH v3 net-next 2/4] tcp: add TCP support for low latency receive poll Eliezer Tamir
2013-05-20 10:16   ` Eliezer Tamir
2013-05-20 13:49   ` Eric Dumazet
2013-05-20 14:59     ` Eliezer Tamir
2013-05-20 14:59       ` Eliezer Tamir
2013-05-20 10:16 ` [PATCH v3 net-next 3/4] ixgbe: Add support for ndo_ll_poll Eliezer Tamir
2013-05-20 10:16   ` Eliezer Tamir
2013-05-20 20:20   ` Or Gerlitz
2013-05-20 20:20     ` Or Gerlitz
2013-05-20 20:33     ` Andi Kleen
2013-05-20 20:42       ` Or Gerlitz
2013-05-20 21:01         ` Andi Kleen
2013-05-21  6:23           ` Or Gerlitz
2013-05-21  6:23             ` Or Gerlitz
2013-05-21  6:54     ` Eliezer Tamir
2013-05-21  6:54       ` Eliezer Tamir
2013-05-21  7:06       ` Eilon Greenstein
2013-05-21  7:06         ` Eilon Greenstein
2013-05-21  7:14         ` David Miller
2013-05-21  8:24           ` Or Gerlitz
2013-05-21  8:24             ` Or Gerlitz
2013-05-21  8:31             ` Eliezer Tamir
2013-05-21  8:31               ` Eliezer Tamir
2013-05-21  8:39             ` David Miller
2013-05-21  8:42               ` Eliezer Tamir
2013-05-21  8:42                 ` Eliezer Tamir
2013-05-21  8:43               ` Or Gerlitz
2013-05-21  8:43                 ` Or Gerlitz
2013-05-21 10:27                 ` Eliezer Tamir
2013-05-21 10:41                   ` Or Gerlitz
2013-05-21  8:21         ` Or Gerlitz
2013-05-21  8:21           ` Or Gerlitz
2013-05-21  8:28           ` Eilon Greenstein
2013-05-21  8:28             ` Eilon Greenstein
2013-05-21 14:19       ` Willem de Bruijn
2013-05-21 14:19         ` Willem de Bruijn
2013-05-20 10:16 ` [PATCH v3 net-next 4/4] ixgbe: add extra stats " Eliezer Tamir
2013-05-20 10:16   ` Eliezer Tamir
2013-05-21 12:06 ` [PATCH v3 net-next 0/4] net: low latency Ethernet device polling Alex Rosenbaum
2013-05-21 12:29   ` Eliezer Tamir
2013-05-21 13:15     ` Alex Rosenbaum
2013-05-21 13:15       ` Alex Rosenbaum
2013-05-21 13:31       ` Eric Dumazet
2013-05-23 11:06       ` Eliezer Tamir
2013-05-23 11:45         ` Alex Rosenbaum
2013-05-21 14:30     ` Willem de Bruijn
2013-05-21 14:30       ` Willem de Bruijn
2013-05-21 18:15     ` Ben Hutchings
2013-05-21 18:15       ` Ben Hutchings
2013-05-22  9:35       ` Eliezer Tamir

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