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Re: [Xen-devel] [PATCH 0/3 V2] xen-netback: switch to NAPI + kthread 1:1 model

On 2013-5-27 19:29, Wei Liu wrote:
* This is a xen-devel only post, since we have not reached concesus on
   what to add / remove in this new model. This series tries to be
   conservative about adding in new feature compared to V1.

This series implements NAPI + kthread 1:1 model for Xen netback.

This model
  - provides better scheduling fairness among vifs
  - is prerequisite for implementing multiqueue for Xen network driver

The first two patches are ground work for the third patch. First one
simplifies code in netback, second one can reduce memory footprint if we
switch to 1:1 model.

The third patch has the real meat:
  - make use of NAPI to mitigate interrupt
  - kthreads are not bound to CPUs any more, so that we can take
    advantage of backend scheduler and trust it to do the right thing

Change since V1:
  - No page pool in this version. Instead page tracking facility is

What is your thought about page pool in V1? will you re-post it later on?


Wei Liu (3):
   xen-netback: remove page tracking facility
   xen-netback: switch to per-cpu scratch space
   xen-netback: switch to NAPI + kthread 1:1 model

  drivers/net/xen-netback/common.h    |   92 ++--
  drivers/net/xen-netback/interface.c |  122 +++--
  drivers/net/xen-netback/netback.c   |  959 +++++++++++++++--------------------
  3 files changed, 537 insertions(+), 636 deletions(-)

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