linux-kernel - Re: [PATCH V3 0/8] macvtap/vhost TX zero copy support

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Message-ID: <1303493508.10632.2.camel@localhost.localdomain>
Date:	Fri, 22 Apr 2011 10:31:48 -0700
From:	Shirley Ma <mashirle@...ibm.com>
To:	Jon Mason <jdmason@...zu.us>
Cc:	David Miller <davem@...emloft.net>, mst@...hat.com,
	Eric Dumazet <eric.dumazet@...il.com>,
	Avi Kivity <avi@...hat.com>, Arnd Bergmann <arnd@...db.de>,
	netdev@...r.kernel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3 0/8] macvtap/vhost TX zero copy support

On Thu, 2011-04-21 at 10:29 -0400, Jon Mason wrote:
> Why are only these 3 drivers getting support?  As far as I can tell,
> the only requirement is HIGHDMA.  If this is the case, is there really
> a need for an additional flag to support this?  If you can key off of
> HIGHDMA, all devices that support this would get the benefit.

Agreed. So far, I have only verified these three 10Gb NICs we have in
our lab. We can enable all devices which support HIGHDMA.

Thanks
Shirley

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