From: David Miller <davem@davemloft.net>
To: David.Laight@ACULAB.COM
Cc: haiyangz@microsoft.com, vkuznets@redhat.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
kys@microsoft.com, jasowang@redhat.com
Subject: Re: [PATCH net-next RFC] net: increase LL_MAX_HEADER for Hyper-V
Date: Wed, 16 Sep 2015 10:59:36 -0700 (PDT) [thread overview]
Message-ID: <20150916.105936.2275139635170756984.davem@davemloft.net> (raw)
In-Reply-To: <063D6719AE5E284EB5DD2968C1650D6D1CB9800B@AcuExch.aculab.com>
From: David Laight <David.Laight@ACULAB.COM>
Date: Wed, 16 Sep 2015 16:25:03 +0000
> Am I right in thinking this is adding an extra 96 unused bytes to the front
> of almost all skb just so that hyper-v can make its link level header
> contiguous with whatever follows (IP header ?).
>
> Doesn't sound ideal.
Agreed, this is rediculous, and the entire stack will incur this cost
just because hyperv is enabled in the kernel config.
next prev parent reply other threads:[~2015-09-16 17:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-16 15:50 [PATCH net-next RFC] net: increase LL_MAX_HEADER for Hyper-V Vitaly Kuznetsov
2015-09-16 16:08 ` Haiyang Zhang
2015-09-16 16:25 ` David Laight
2015-09-16 17:26 ` Alexander Duyck
2015-09-16 17:55 ` KY Srinivasan
2015-09-16 21:38 ` Alexander Duyck
2015-09-16 22:57 ` KY Srinivasan
2015-09-16 23:48 ` Alexander Duyck
2015-09-16 23:58 ` KY Srinivasan
2015-09-17 8:38 ` David Laight
2015-09-17 15:14 ` KY Srinivasan
2015-09-17 18:52 ` David Miller
2015-09-17 19:52 ` KY Srinivasan
2015-09-17 20:10 ` David Miller
2015-09-17 21:16 ` KY Srinivasan
2015-09-16 17:59 ` David Miller [this message]
2015-09-17 9:03 ` Vitaly Kuznetsov
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