netdev - Re: [PATCH net-next] virtio: Fix affinity for >32 VCPUs

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Message-ID: <088e4130-3444-251b-c6f3-9c4d9bb3e255@hpe.com>
Date:   Fri, 3 Feb 2017 10:33:06 -0800
From:   Rick Jones <rick.jones2@....com>
To:     Benjamin Serebrin <serebrin@...gle.com>,
        "Michael S. Tsirkin" <mst@...hat.com>
Cc:     netdev@...r.kernel.org, jasowang@...hat.com,
        David Miller <davem@...emloft.net>,
        Willem de Bruijn <willemb@...gle.com>,
        Venkatesh Srinivas <venkateshs@...gle.com>,
        James Mattson <jmattson@...gle.com>
Subject: Re: [PATCH net-next] virtio: Fix affinity for >32 VCPUs

On 02/03/2017 10:22 AM, Benjamin Serebrin wrote:
> Thanks, Michael, I'll put this text in the commit log:
>
> XPS settings aren't write-able from userspace, so the only way I know
> to fix XPS is in the driver.

??

root@...cp1-c0-m1-mgmt:/home/stack# cat 
/sys/devices/pci0000:00/0000:00:02.0/0000:04:00.0/net/hed0/queues/tx-0/xps_cpus
00000000,00000001
root@...cp1-c0-m1-mgmt:/home/stack# echo 0 > 
/sys/devices/pci0000:00/0000:00:02.0/0000:04:00.0/net/hed0/queues/tx-0/xps_cpus
root@...cp1-c0-m1-mgmt:/home/stack# cat 
/sys/devices/pci0000:00/0000:00:02.0/0000:04:00.0/net/hed0/queues/tx-0/xps_cpus
00000000,00000000