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From: "K. Y. Srinivasan" <kys@microsoft.com>
To: 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: [PATCH net-next 02/10] hv_netvsc: Rearrange the hv_negtvsc_packet to be space efficient
Date: Mon, 23 Nov 2015 15:28:58 -0800	[thread overview]
Message-ID: <1448321346-21357-2-git-send-email-kys@microsoft.com> (raw)
In-Reply-To: <1448321346-21357-1-git-send-email-kys@microsoft.com>

Rearrange the elements of struct hv_negtvsc_packet for optimal layout -
eliminate unnecessary padding.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
---
 drivers/net/hyperv/hyperv_net.h |   18 ++++++++++--------
 1 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 972e562..7435673 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -128,32 +128,34 @@ struct ndis_tcp_ip_checksum_info;
 struct hv_netvsc_packet {
 	/* Bookkeeping stuff */
 	u8 status;
-
 	u8 is_data_pkt;
 	u8 xmit_more; /* from skb */
 	u8 cp_partial; /* partial copy into send buffer */
 
-	u16 vlan_tci;
+	u8 rmsg_size; /* RNDIS header and PPI size */
+	u8 rmsg_pgcnt; /* page count of RNDIS header and PPI */
+	u8 page_buf_cnt;
+	u8 pad0;
 
+	u16 vlan_tci;
 	u16 q_idx;
+	u32 send_buf_index;
+
+	u32 total_data_buflen;
+	u32 pad1;
+
 	struct vmbus_channel *channel;
 
 	u64 send_completion_tid;
 	void *send_completion_ctx;
 	void (*send_completion)(void *context);
 
-	u32 send_buf_index;
 
 	/* This points to the memory after page_buf */
 	struct rndis_message *rndis_msg;
 
-	u8 rmsg_size; /* RNDIS header and PPI size */
-	u8 rmsg_pgcnt; /* page count of RNDIS header and PPI */
-
-	u32 total_data_buflen;
 	/* Points to the send/receive buffer where the ethernet frame is */
 	void *data;
-	u8 page_buf_cnt;
 	struct hv_page_buffer *page_buf;
 };
 
-- 
1.7.4.1

  reply	other threads:[~2015-11-23 23:28 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   ` K. Y. Srinivasan [this message]
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
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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