From: Florian Westphal <fw@strlen.de>
To: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: davem@davemloft.net, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, devel@linuxdriverproject.org,
olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com
Subject: Re: [PATCH net-next 08/10] hv_netvsc: Don't ask for additional head room in the skb
Date: Tue, 24 Nov 2015 09:55:32 +0100 [thread overview]
Message-ID: <20151124085532.GA1740@breakpoint.cc> (raw)
In-Reply-To: <1448321346-21357-8-git-send-email-kys@microsoft.com>
K. Y. Srinivasan <kys@microsoft.com> wrote:
> The rndis header is 116 bytes big and can be placed in the default
> head room that will be available in the skb. Since the netvsc packet
> is less than 48 bytes, we can use the skb control buffer
> for the netvsc packet. With these changes we don't need to
> ask for additional head room.
Minor nit: could you add a BUILD_BUG_ON test for this? Something like
BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > FIELD_SIZEOF(struct sk_buff, cb));
next prev parent reply other threads:[~2015-11-24 8:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-23 23:28 [PATCH net-next 00/10] hv_netvsc: Eliminate the additional head room K. Y. Srinivasan
2015-11-23 23:28 ` [PATCH net-next 01/10] hv_netvsc: Resize some of the variables in hv_netvsc_packet K. Y. Srinivasan
2015-11-23 23:28 ` [PATCH net-next 02/10] hv_netvsc: Rearrange the hv_negtvsc_packet to be space efficient K. Y. Srinivasan
2015-11-23 23:28 ` [PATCH net-next 03/10] hv_netvsc: Eliminate the channel field in hv_netvsc_packet structure K. Y. Srinivasan
2015-11-23 23:29 ` [PATCH net-next 04/10] hv_netvsc: Eliminate rndis_msg pointer from " K. Y. Srinivasan
2015-11-23 23:29 ` [PATCH net-next 05/10] hv_netvsc: Eliminatte the data field from struct hv_netvsc_packet K. Y. Srinivasan
2015-11-23 23:29 ` [PATCH net-next 06/10] hv_netvsc: Eliminate send_completion " K. Y. Srinivasan
2015-11-23 23:29 ` [PATCH net-next 07/10] hv_netvsc: Eliminate send_completion_ctx " K. Y. Srinivasan
2015-11-23 23:29 ` [PATCH net-next 08/10] hv_netvsc: Don't ask for additional head room in the skb K. Y. Srinivasan
2015-11-24 8:55 ` Florian Westphal [this message]
2015-11-24 16:39 ` KY Srinivasan
2015-11-24 8:56 ` Vitaly Kuznetsov
2015-11-24 16:27 ` KY Srinivasan
2015-11-23 23:29 ` [PATCH net-next 09/10] hv_netvsc: move subchannel existence check to netvsc_select_queue() K. Y. Srinivasan
2015-11-23 23:29 ` [PATCH net-next 10/10] hv_netvsc: remove locking in netvsc_send() K. Y. Srinivasan
2015-11-24 8:48 ` [PATCH net-next 01/10] hv_netvsc: Resize some of the variables in hv_netvsc_packet Vitaly Kuznetsov
2015-11-24 16:29 ` KY Srinivasan
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