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From: | Wei Wang |
Subject: | Re: [Qemu-devel] [virtio-dev] Re: [virtio-dev] Re: [virtio-dev] Re: [PATCH v1] virtio-net: enable configurable tx queue size |
Date: | Mon, 19 Jun 2017 15:40:51 +0800 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
On 06/19/2017 03:46 AM, Michael S. Tsirkin wrote:
What do you have in mind about the protocol flag?Merely this: older clients might be confused if they get a s/g with 1024 entries.I don't disagree to add that. But the client (i.e. vhost-user slave) is a host userspace program, and it seems that users can easily patch their host side applications if there is any issue, maybe we also don't need to be too prudent about that, do we?I won't insist on this but it might not be easy. For example, are there clients that want to forward the packet to host kernel as a s/g?
Not sure about all the client implementation, but it sounds like a strange and inefficient usage of vhost-user to pass packets to the host kernel, given vhost kernel backend is already there for the usage. Best, Wei
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