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

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Message-ID: <7651ccc0-9ef7-0419-93ae-47da1158c2d1@hpe.com>
Date:   Fri, 3 Feb 2017 10:34:48 -0800
From:   Rick Jones <rick.jones2@....com>
To:     Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        Benjamin Serebrin <serebrin@...gle.com>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Network Development <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 10:31 AM, Willem de Bruijn wrote:
> Configuring interrupts and xps from userspace at boot is more robust,
> as device driver defaults can change. But especially for customers who
> are unaware of these settings, choosing sane defaults won't hurt.

The devil is in finding the sane defaults.  For example, the issues 
we've seen with VMs sending traffic getting reordered when the driver 
took it upon itself to enable xps.

rick jones