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From: | Paolo Bonzini |
Subject: | Re: [Qemu-devel] [PATCH 14/15] hw/block/virtio-blk: create num_queues vqs if dataplane is enabled |
Date: | Wed, 30 Jul 2014 17:25:00 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 |
Il 30/07/2014 17:12, Michael S. Tsirkin ha scritto: >> > >> > Dataplane must not be a change to the guest ABI. If you implement this >> > feature you have to implement it for both dataplane and non-dataplne. >> > >> > Paolo > Actually, I think different backends at runtime should be allowed to > change guest visible ABI. For example if you give qemu a read only > backend this is guest visible right? Dataplane is not meant to be a different backend, it's just moving stuff out to a separate thread. It's only due to QEMU limitation that it doesn't share the vring code (and these patches include a lot of steps backwards where dataplane becomes != non-dataplane). Paolo
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