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Subject: Re: Re: [virtio-comment] [PATCH v2 01/11] transport-fabrics: introduce Virtio Over Fabrics overview
On Thu, May 04, 2023 at 05:46:46PM +0800, zhenwei pi wrote: > > > On 5/4/23 16:57, David Hildenbrand wrote: > > On 04.05.23 10:19, zhenwei pi wrote: > > > In the past years, virtio supports lots of device specifications by > > > PCI/MMIO/CCW. These devices work fine in the virtualization environment. > > > > > > Introduce Virtio Over Fabrics transport to support "network defined > > > peripheral devices". With this transport, Many Virtio based devices > > > transparently work over fabrics. Note that the balloon device may not > > > make sense. Shared memory regions won't work. > > > > Anything that involves memory (memory balloon, memory device, shared > > memory) is fully incompatible I would guess. > > > > Hi, > > Agree that memory device and shared memory is incompatible. > > But memory balloon device, I don't know if it's possible to use in future. > As far as I can imagine: a user process runs virtio-of target by listening > localhost, and memory balloon isolates same pages from kernel, the user > process maps these physical pages into virtual memory ... I don't see anything big that is wrong with balloon. device inflates balloon, this memory is stolen from guest. isn't this what user wanted? presumably there's a way for device to send this information to the hypervisor otherwise it seems kind of pointless. -- MST
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