linux-kernel - RE: [PATCH 11/11] scsi: storvsc: Re-init stor_chns when a channel interrupt is re-assigned

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Message-ID: <DM5PR2101MB10478227BEEBACCDE8999CDBD7DE0@DM5PR2101MB1047.namprd21.prod.outlook.com>
Date:   Fri, 10 Apr 2020 19:35:50 +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>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
Subject: RE: [PATCH 11/11] scsi: storvsc: Re-init stor_chns when a channel
 interrupt is re-assigned

From: Andrea Parri (Microsoft) <parri.andrea@...il.com> Sent: Sunday, April 5, 2020 5:15 PM
> 
> For each storvsc_device, storvsc keeps track of the channel target CPUs
> associated to the device (alloced_cpus) and it uses this information to
> fill a "cache" (stor_chns) mapping CPU->channel according to a certain
> heuristic.  Update the alloced_cpus mask and the stor_chns array when a
> channel of the storvsc device is re-assigned to a different CPU.
> 
> Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@...il.com>
> Cc: "James E.J. Bottomley" <jejb@...ux.ibm.com>
> Cc: "Martin K. Petersen" <martin.petersen@...cle.com>
> Cc: <linux-scsi@...r.kernel.org>
> ---
>  drivers/hv/vmbus_drv.c     |  4 ++
>  drivers/scsi/storvsc_drv.c | 95 ++++++++++++++++++++++++++++++++++----
>  include/linux/hyperv.h     |  3 ++
>  3 files changed, 94 insertions(+), 8 deletions(-)
> 

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