Re: [Question]About KVM network zero-copy feature!
From: Stephen Hemminger <hidden>
Date: 2012-08-11 20:55:56
Also in:
kvm, virtualization
On Fri, 10 Aug 2012 11:34:32 +0800 "Peter Huang(Peng)" [off-list ref] wrote:
Hi,All I searched from git-log, and found that until now we have vhost TX zero-copy experiment feature, how about RX zero-copy? For XEN, net-back also only has TX zero-copy, Is there any reason that RX zero-copy still not implemented?
There is no guarantee that packet will ever be read by receiver. This means zero-copy could create memory back pressure stalls.