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Date: Wed, 20 Aug 2014 12:05:20 +0200 From: "Michael S. Tsirkin" <mst@...hat.com> To: "Zhangjie (HZ)" <zhangjie14@...wei.com> Cc: Jason Wang <jasowang@...hat.com>, netdev@...r.kernel.org, davem@...emloft.net, kvm@...r.kernel.org, liuyongan@...wei.com, qinchuanyu@...wei.com Subject: Re: [Questions] On Wed, Aug 20, 2014 at 05:37:01PM +0800, Zhangjie (HZ) wrote: > Hi MST, > > I see "reduce networking latency" > from Networking Todo, the idea is to "allow handling short packets from softirq or VCPU context". > If from softirq context, how could softirq copy skb to guest memory? If the method is to use mmstruct of Qemu, > would it be expensive? I have some very rough patches to explain this part of the idea. Will dig them out for you. > If from VCPU context, maybe the internal operation of the virtual machine will have a significant delay. We'd have to find a good heuristic here. Maybe for a small number of very short packets the delay won't be significant. > Thanks! > -- > Best Wishes! > Zhang Jie -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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