linux-kernel - RE: [PATCH 08/11] Drivers: hv: vmbus: Remove the unused HV

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Date:   Fri, 10 Apr 2020 19:32:24 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     "Andrea Parri (Microsoft)" <parri.andrea@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        Dexuan Cui <decui@...rosoft.com>,
        Boqun Feng <boqun.feng@...il.com>,
        vkuznets <vkuznets@...hat.com>
Subject: RE: [PATCH 08/11] Drivers: hv: vmbus: Remove the unused HV_LOCALIZED
 channel affinity logic

From: Andrea Parri (Microsoft) <parri.andrea@...il.com> Sent: Sunday, April 5, 2020 5:15 PM
> 
> The logic is unused since commit 509879bdb30b8 ("Drivers: hv: Introduce
> a policy for controlling channel affinity").
> 
> This logic assumes that a channel target_cpu doesn't change during the
> lifetime of a channel, but this assumption is incompatible with the new
> functionality that allows changing the vCPU a channel will interrupt.
> 
> Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@...il.com>
> ---
>  drivers/hv/channel_mgmt.c | 105 +++++++++-----------------------------
>  include/linux/hyperv.h    |  27 ----------
>  2 files changed, 25 insertions(+), 107 deletions(-)
> 

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>