From: David Miller <davem@davemloft.net>
To: sowmini.varadhan@oracle.com
Cc: jbenc@redhat.com, netdev@vger.kernel.org,
hannes@stressinduktion.org, aduyck@mirantis.com,
daniel@iogearbox.net, pabeni@redhat.com
Subject: Re: [PATCH net-next] net/vxlan: Avoid unaligned access in vxlan_build_skb()
Date: Fri, 23 Sep 2016 08:06:18 -0400 (EDT) [thread overview]
Message-ID: <20160923.080618.678103827885223586.davem@davemloft.net> (raw)
In-Reply-To: <20160922213010.GA32052@oracle.com>
From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Date: Thu, 22 Sep 2016 17:30:10 -0400
> On (09/22/16 01:52), David Miller wrote:
>> Alternatively we can do Alexander Duyck's trick, by pushing
>> the headers into the frag list, forcing a pull and realignment
>> by the next protocol layer.
>
> What is the "Alexander Duyck trick" (hints about module or commit id,
> where this can be found, please)?
>
> Is this basically about, e.g., putting the vxlanhdr in its own
> skb_frag_t, or something else?
Yes, and this way skb_header_pointer() is forced to do a memcpy.
next prev parent reply other threads:[~2016-09-23 12:06 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-20 14:27 [PATCH net-next] net/vxlan: Avoid unaligned access in vxlan_build_skb() Sowmini Varadhan
2016-09-20 15:31 ` Tom Herbert
2016-09-20 15:49 ` Sowmini Varadhan
2016-09-20 16:11 ` Jiri Benc
2016-09-20 16:31 ` Sowmini Varadhan
2016-09-20 16:43 ` Jiri Benc
2016-09-20 17:07 ` Sowmini Varadhan
2016-09-20 17:15 ` Jiri Benc
2016-09-20 17:09 ` Jiri Benc
2016-09-20 17:19 ` Tom Herbert
2016-09-20 17:24 ` Sowmini Varadhan
2016-09-22 5:52 ` David Miller
2016-09-22 21:30 ` Sowmini Varadhan
2016-09-23 12:06 ` David Miller [this message]
2016-09-23 14:17 ` Alexander Duyck
2016-09-23 17:20 ` Sowmini Varadhan
2016-09-23 17:38 ` Alexander Duyck
2016-09-23 23:41 ` Sowmini Varadhan
2016-09-24 0:43 ` Alexander Duyck
2016-09-28 17:03 ` Sowmini Varadhan
2016-09-28 18:08 ` Alexander Duyck
2016-09-28 19:56 ` Sowmini Varadhan
2016-09-20 16:45 ` Hannes Frederic Sowa
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