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Date: Tue, 14 Sep 2010 10:02:25 -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 18:29 +0200, Michael S. Tsirkin wrote: > Precisely. This is what the patch from Xin Xiaohui does. That code > already seems to do most of what you are trying to do, right? I thought host pins guest kernel buffer pages was good enough for TX thought I didn't look up xiaohui's vhost asycn io patch in details. What's the performance data Xiaohui got from using kiocb? I haven't seen any performance number from him yet. > The main thing missing seems to be macvtap integration, so that we can > fall back > on data copy if zero copy is unavailable? > How hard would it be to basically link the mp and macvtap modules > together to get us this functionality? Anyone? The simple integration is using macvtap + xiaohui's vhost asycn io patch. I can make a try for TX only. 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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