linux-kernel - Re: [PATCH 1/1] Drivers: hv: Introduce a policy for controlling channel affinity

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Date:   Wed, 31 Aug 2016 12:44:09 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     kys@...rosoft.com
Cc:     linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
        olaf@...fle.de, apw@...onical.com, vkuznets@...hat.com,
        jasowang@...hat.com, leann.ogasawara@...onical.com,
        "K. Y. Srinivasan" <kys@...hange.microsoft.com>
Subject: Re: [PATCH 1/1] Drivers: hv: Introduce a policy for controlling
 channel affinity

On Wed, Jul 06, 2016 at 06:02:15PM -0700, kys@...hange.microsoft.com wrote:
> From: K. Y. Srinivasan <kys@...hange.microsoft.com>
> 
> Introduce a mechanism to control how channels will be affinitized. We will
> support two policies:
> 
> 1. HV_BALANCED: All performance critical channels will be dstributed
> evenly amongst all the available NUMA nodes. Once the Node is assigned,
> we will assign the CPU based on a simple round robin scheme.
> 
> 2. HV_LOCALIZED: Only the primary channels are distributed across all
> NUMA nodes. Sub-channels will be in the same NUMA node as the primary
> channel. This is the current behaviour.
> 
> The default policy will be the HV_BALANCED as it can minimize the remote
> memory access on NUMA machines with applications that span NUMA nodes.
> 
> Signed-off-by: K. Y. Srinivasan <kys@...hange.microsoft.com>
> Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> ---
>  drivers/hv/channel_mgmt.c |   68 +++++++++++++++++++++++++-------------------
>  include/linux/hyperv.h    |   23 +++++++++++++++
>  2 files changed, 62 insertions(+), 29 deletions(-)

Also doesn't apply cleanly :(