Messages in this thread | | | Date | Fri, 16 Dec 2011 15:40:01 +0800 | From | Zang Hongyong <> | Subject | Re: [PATCH 0/2] vhot-net: Use kvm_memslots instead of vhost_memory to translate GPA to HVA |
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于 2011/12/16,星期五 15:05, Sasha Levin 写道: > On Fri, 2011-12-16 at 13:32 +0800, zanghongyong@huawei.com wrote: >> From: Hongyong Zang<zanghongyong@huawei.com> >> >> Vhost-net uses its own vhost_memory, which results from user space (qemu) info, >> to translate GPA to HVA. Since kernel's kvm structure already maintains the >> address relationship in its member *kvm_memslots*, these patches use kernel's >> kvm_memslots directly without the need of initialization and maintenance of >> vhost_memory. > Conceptually, vhost isn't aware of KVM - it's just a driver which moves > data from vq to a tap device and back. You can't simply add KVM specific > code into vhost. > > Whats the performance benefit? > But vhost-net is only used in virtualization situation. vhost_memory is maintained by user space qemu. In this way, the memory relationship can be accquired from kernel without the need of maintainence of vhost_memory from qemu.
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