Re: [Xen-devel] [PATCH net-next v1 0/8] xen-netback: support toeplitz hashing

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: netdev-owner@xxxxxxxxxxxxxxx [mailto:netdev-
> owner@xxxxxxxxxxxxxxx] On Behalf Of David Miller
> Sent: 12 February 2016 10:54
> To: Paul Durrant
> Cc: netdev@xxxxxxxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxxx
> Subject: Re: [PATCH net-next v1 0/8] xen-netback: support toeplitz hashing
> 
> From: Paul Durrant <paul.durrant@xxxxxxxxxx>
> Date: Fri, 12 Feb 2016 10:13:17 +0000
> 
> > This patch series adds support for frontend-configurable toeplitz hashing
> > in xen-netback (on the guest receive side). This support has been testing
> > against a Windows frontend and has proven to be sufficient to pass the
> > Microsoft HCK NDIS RSS tests.
> 
> We want less Toeplitz users, not more of them.  It is a more unsuitable
> hash than jhash2.
> 
> I'm not applying these patches, sorry.

Windows *requires* use of Teoplitz so your position completely rules out being 
able to support receive side scaling in Windows PV frontends on Linux kernel 
backends, not only for Xen but for any other hypervisor, which I think is 
totally unreasonable.

  Paul

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