From: Pekka Riikonen <priikone@iki.fi>
To: Eric Dumazet <eric.dumazet@gmail.com>
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 19:02:19 +0200 (CEST) [thread overview]
Message-ID: <alpine.GSO.2.00.1305211855120.9230@git.silcnet.org> (raw)
In-Reply-To: <1369142926.3301.213.camel@edumazet-glaptop>
On Tue, 21 May 2013, Eric Dumazet wrote:
: > > Alternatively, use a napi_id instead of a pointer.
: >
: > I'm not sure I understand what you propose.
:
: Oh well.
:
: To get a pointer to a struct net_device, we can use ifindex, and do a
: rcu lookup into a hash table to get the net_device. We do not need
: {pointer,ifindex} but {ifindex} is enough
:
: My suggestion is to not have skb->skb_ref but skb->napi_index : Its safe
: to copy its value from skb->napi_index to sk->napi_index without
: refcounting.
:
: All NAPI need to get a unique napi_index, and be inserted in a hash
: table for immediate/fast lookup.
:
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.
Pekka
next prev parent reply other threads:[~2013-05-21 17:03 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 [this message]
2013-05-21 17:48 ` Eric Dumazet
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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