From: Daniel Borkmann <dborkman@redhat.com>
To: ratheesh kannoth <ratheesh.ksz@gmail.com>
Cc: netdev@vger.kernel.org, linux-net@vger.kernel.org
Subject: Re: zero copy with PACKET_MMAP
Date: Thu, 27 Feb 2014 10:58:30 +0100 [thread overview]
Message-ID: <530F0C46.5040208@redhat.com> (raw)
In-Reply-To: <CAGZFCEF0RB2eHOfgVCyjVDEc4S+jHsdJ+-iQdbC3zek7G5Ahcg@mail.gmail.com>
On 02/27/2014 07:40 AM, ratheesh kannoth wrote:
...
> https://www.kernel.org/doc/Documentation/networking/packet_mmap.txt
> talks about achieving zero copy. But i find a deep packet copy ( of
> length snaplen= skb->len ) here
> http://lxr.free-electrons.com/source/net/packet/af_packet.c#L1841.
>
> Is there anything missing/wrong in my understanding ?
The zero-copy is between user and kernel space.
next prev parent reply other threads:[~2014-02-27 9:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-27 6:40 zero copy with PACKET_MMAP ratheesh kannoth
2014-02-27 9:58 ` Daniel Borkmann [this message]
[not found] <CAGZFCEF0zwQbNYU6yH8i=ebnhtVFeJRA0_XVDvgJ4O0Z5ietHw@mail.gmail.com>
2014-02-27 7:28 ` Fwd: " ratheesh kannoth
2014-02-27 17:10 ` Jeff Haran
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