On Tue, May 12, 2015 at 07:18:24PM +0200, Joao Martins wrote:

There have been recently[3] some discussions and issues raised on
persistent grants for the block layer, though the numbers above
show some significant improvements specially on more network intensive
workloads and provide a margin for comparison against future map/unmap
improvements.

Any comments or suggestions are welcome,
Thanks!

Thanks, the numbers certainly look interesting.

I'm just a bit concerned about the complexity of netback. I've
commented on individual patches, we can discuss the issues there.

Wei.

Joao

[1] http://article.gmane.org/gmane.linux.network/249383
[2] http://bit.ly/1IhJfXD
[3] http://lists.xen.org/archives/html/xen-devel/2015-02/msg02292.html

Joao Martins (13):
  xen-netback: add persistent grant tree ops
  xen-netback: xenbus feature persistent support
  xen-netback: implement TX persistent grants
  xen-netback: implement RX persistent grants
  xen-netback: refactor xenvif_rx_action
  xen-netback: copy buffer on xenvif_start_xmit()
  xen-netback: add persistent tree counters to debugfs
  xen-netback: clone skb if skb->xmit_more is set
  xen-netfront: move grant_{ref,page} to struct grant
  xen-netfront: refactor claim/release grant
  xen-netfront: feature-persistent xenbus support
  xen-netfront: implement TX persistent grants
  xen-netfront: implement RX persistent grants

 drivers/net/xen-netback/common.h    |  79 ++++
 drivers/net/xen-netback/interface.c |  78 +++-
 drivers/net/xen-netback/netback.c   | 873 ++++++++++++++++++++++++++++++------
 drivers/net/xen-netback/xenbus.c    |  24 +
 drivers/net/xen-netfront.c          | 362 ++++++++++++---
 5 files changed, 1216 insertions(+), 200 deletions(-)

-- 
2.1.3