linux-kernel - Re: [PATCH v10 net-next 3/6] udp: add low latency socket poll support

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Message-ID: <CA+FuTSc1tcDDuqDiKJ=gSj7htX63EVa_kzK4O5UKtZWA87+dew@mail.gmail.com>
Date:	Mon, 10 Jun 2013 12:38:20 -0400
From:	Willem de Bruijn <willemb@...gle.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Eliezer Tamir <eliezer.tamir@...ux.intel.com>,
	David Miller <davem@...emloft.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	e1000-devel <e1000-devel@...ts.sourceforge.net>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Andi Kleen <andi@...stfloor.org>, HPA <hpa@...or.com>,
	Eilon Greenstien <eilong@...adcom.com>,
	Or Gerlitz <or.gerlitz@...il.com>,
	Amir Vadai <amirv@...lanox.com>,
	Eliezer Tamir <eliezer@...ir.org.il>
Subject: Re: [PATCH v10 net-next 3/6] udp: add low latency socket poll support

On Mon, Jun 10, 2013 at 10:31 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Mon, 2013-06-10 at 11:40 +0300, Eliezer Tamir wrote:
>> Add upport for busy-polling on UDP sockets.
>> In __udp[46]_lib_rcv add a call to sk_mark_ll() to copy the napi_id
>> from the skb into the sk.
>> This is done at the earliest possible moment, right after we identify
>> which socket this skb is for.
>> In __skb_recv_datagram When there is no data and the user
>> tries to read we busy poll.
>>
>> Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
>> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
>> Signed-off-by: Eliezer Tamir <eliezer.tamir@...ux.intel.com>
>> ---
>>
>>  net/core/datagram.c |    4 ++++
>>  net/ipv4/udp.c      |    6 +++++-
>>  net/ipv6/udp.c      |    6 +++++-
>>  3 files changed, 14 insertions(+), 2 deletions(-)
>
> Acked-by: Eric Dumazet <edumazet@...gle.com>
>

Tested-by: Willem de Bruijn <willemb@...gle.com>

(per Eliezer's request)
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