netdev - Re: [PATCH net-next 0/4] ixgbe: enable Relaxed Order for ARM64

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Date:   Sat, 01 Apr 2017 01:39:22 -0700
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     Ding Tianhong <dingtianhong@...wei.com>, catalin.marinas@....com,
        will.deacon@....com, mark.rutland@....com, robin.murphy@....com,
        davem@...emloft.net, alexander.duyck@...il.com,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/4] ixgbe: enable Relaxed Order for ARM64

On Sat, 2017-04-01 at 15:25 +0800, Ding Tianhong wrote:
> The IXGBE_ALLOW_RELAXED_ORDER will enable Relaxed Ordering (RO) which
> allows
> transactions that do not have any order of completion requirements to
> complete more efficiently compare to the Stricted Ordering (SO) for
> ixbge
> nic card. Some architecture will see high write-to-memory performance
> when RO is
> enabled on the data transactions just like the SPARC did.
> 
> The aarch64 could both support Relaxed Ordering (RO) and Stricted
> Ordering (SO),
> so enable this config could get much more better performance, didn't
> see any
> adverse effects.
> 
> The ARCH_WANT_RELAX_ORDER looks more general and would cause
> misleading and
> ambiguous, and till now only ixgbe could enable this "flag", so
> rename this
> config more specific.
> 
> After discussion with the architecture maintainer, enable this config
> in driver
> looks more appropriate to compatible several architecture just like
> SPARC and ARM64,
> maybe we need more discussion about this, so let's begin by this
> patch set.
> 
> In the last patch 1a8b6d76(net:add one common config ...), Mao only
> fix the
> config name issue for 82599 pf, but the 82598 and 82599 vf still need
> to be fixed,
> so rename the config all in the drivers to instead of CONFIG_SPARC.

Thank you for at least CC'ing me, but please remember to also CC intel-
wired-lan@...ts.osuosl.org mailing list.  It make it easier for me to
add your patches to my queue and makes it visible for the
developers/validation people who will be reviewing and testing your
changes.

> 
> Ding Tianhong (4):
>   ixgbe: sparc: rename the ARCH_WANT_RELAX_ORDER to
>     IXGBE_ALLOW_RELAXED_ORDER
>   ixgbe: ixgbevf: Clear the CONFIG_SPARC for ixgbevf and 82598
>   ixgbe: move IXGBE_ALLOW_RELAXED_ORDER from architecture to driver
>   ixgbe: enable IXGBE_ALLOW_RELAXED_ORDER for ARM64
> 
>  arch/Kconfig                                      | 3 ---
>  arch/sparc/Kconfig                                | 1 -
>  drivers/net/ethernet/intel/Kconfig                | 4 ++++
>  drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c    | 4 ++--
>  drivers/net/ethernet/intel/ixgbe/ixgbe_common.c   | 2 +-
>  drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 2 +-
>  6 files changed, 8 insertions(+), 8 deletions(-)

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