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Date: Tue, 14 Sep 2010 12:36:23 -0700 From: Shirley Ma <mashirle@...ibm.com> To: "Michael S. Tsirkin" <mst@...hat.com> Cc: Arnd Bergmann <arnd@...db.de>, Avi Kivity <avi@...hat.com>, "Xin, Xiaohui" <xiaohui.xin@...el.com>, David Miller <davem@...emloft.net>, netdev@...r.kernel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [RFC PATCH 2/2] macvtap: TX zero copy between guest and host kernel On Tue, 2010-09-14 at 21:01 +0200, Michael S. Tsirkin wrote: > > > I think that you should be able to simply combine > > > the two drivers together, add an ioctl to > > > enable/disable zero copy mode of operation. > > > > That could work. But what's the purpose to have two drivers if one > > driver can handle it? > > > > Thanks > > Shirley > > This was just an idea: I thought it's a good way for people interested > in this zero copy thing to combine forces and avoid making > the same mistakes, but it's not a must of course. Ok, I will make a simple patch by reusing Xiaohui's some vhost code on handling vhost_add_used_and_signal() to see any performance changes. The interesting thing here when I run 32 instances netperf/netserver I didn't see any issue w/i this patch. Thanks Shirley -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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