From: David Vrabel <david.vrabel@citrix.com>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: xen-devel@lists.xenproject.org,
Malcolm Crossley <malcolm.crossley@citrix.com>,
Paul Durrant <paul.durrant@citrix.com>,
Wei Liu <wei.liu2@citrix.com>
Subject: Re: [PATCHv2 net-next] xen-netback: remove unconditional __pskb_pull_tail() in guest Tx path
Date: Wed, 5 Nov 2014 11:01:35 +0000 [thread overview]
Message-ID: <545A038F.2020303@citrix.com> (raw)
In-Reply-To: <1415185138.11486.87.camel@citrix.com>
On 05/11/14 10:58, Ian Campbell wrote:
> Dropping netdev since this isn't relevant to them, adding Paul
>
> On Wed, 2014-11-05 at 10:50 +0000, David Vrabel wrote:
>> - performance: Netback has already grant copied up-to 128 bytes from
>> the first slot of a packet into the linear area. The first slot
>> normally contain all the IPv4/IPv6 and TCP/UDP headers.
>
> Does "normally" here include guests other than Linux? I thought Windows
> in particular was prone to splitting the headers into a frag per layer
> or thereabouts?
I'm not sure what guests Malcolm tested with.
David
next prev parent reply other threads:[~2014-11-05 11:01 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-05 10:50 [PATCHv2 net-next] xen-netback: remove unconditional __pskb_pull_tail() in guest Tx path David Vrabel
2014-11-05 10:57 ` Ian Campbell
2014-11-05 10:57 ` Ian Campbell
2014-11-05 10:58 ` Ian Campbell
2014-11-05 11:01 ` David Vrabel [this message]
2014-11-05 10:59 ` Ian Campbell
2014-11-05 11:17 ` Paul Durrant
2014-11-05 11:20 ` Ian Campbell
2014-11-05 11:24 ` Paul Durrant
2014-11-05 18:07 ` Konrad Rzeszutek Wilk
2014-11-05 19:02 ` annie li
2014-11-06 9:52 ` Paul Durrant
2014-11-06 19:40 ` David Miller
2014-11-06 19:40 ` David Miller
-- strict thread matches above, loose matches on Subject: below --
2014-11-05 10:50 David Vrabel
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