netdev - [PATCHv7 net-next 0/4] sunvnet: add jumbo frames support

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Message-ID: <542999EC.40900@oracle.com>
Date:	Mon, 29 Sep 2014 13:42:04 -0400
From:	David L Stevens <david.stevens@...cle.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org,
	Sowmini Varadhan <sowmini.varadhan@...cle.com>,
	Raghuram Kothakota <Raghuram.Kothakota@...cle.com>
Subject: [PATCHv7 net-next 0/4] sunvnet: add jumbo frames support


This patch set updates the sunvnet driver to version 1.6 of the VIO protocol
to support per-port exchange of MTU information and allow non-standard MTU
sizes, including jumbo frames.

Using large MTUs shows a nearly 5X throughput improvement Linux-Solaris
and > 10X throughput improvement Linux-Linux.

Changes from v6:
	-made kernel transmit path zero-copy to remove memory n^2 scaling issue
	 raised by Raghuram Kothakota <Raghuram.Kothakota@...cle.com>
Changes from v5:
	- fixed comment per Sowmini Varadhan <sowmini.varadhan@...cle.com>
Changes from v4:
	- changed VNET_MAXPACKET per David Laight <David.Laight@...LAB.COM>
	- added cookies to support non-contiguous buffers of max size
Changes from v3:
	- added version functions per Dave Miller <davem@...emloft.net>
	- moved rmtu to vnet_port per Dave Miller <davem@...emloft.net>
	- explicitly set options bits and capability flags to 0 per
		Raghuram Kothakota <Raghuram.Kothakota@...cle.com>
Changes from v2:
	- make checkpatch clean
Changes from v1:
	- fix brace formatting per Dave Miller <davem@...emloft.net>

David L Stevens (4):
  sunvnet: upgrade to VIO protocol version 1.6
  sunvnet: make transmit path zero-copy in the kernel
  sunvnet: allow admin to set sunvnet MTU
  sunvnet: generate ICMP PTMUD messages for smaller port MTUs

 arch/sparc/include/asm/vio.h       |   44 +++++-
 arch/sparc/kernel/ldc.c            |    2 +-
 arch/sparc/kernel/viohs.c          |   14 ++-
 drivers/net/ethernet/sun/sunvnet.c |  313 +++++++++++++++++++++++++++++-------
 drivers/net/ethernet/sun/sunvnet.h |    9 +-
 5 files changed, 315 insertions(+), 67 deletions(-)

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