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

[annie li <annie.li@oracle.com>]

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
>     removed.

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

Thanks
Annie
>
> 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(-)
>