Re: [PATCH v4 0/6] virtio core DMA API conversion

From: Benjamin Herrenschmidt
Date: Tue Nov 10 2015 - 15:31:26 EST

On Tue, 2015-11-10 at 14:43 +0200, Michael S. Tsirkin wrote:
> But not virtio-pci I think - that's broken for that usecase since we use
> weaker barriers than required for real IO, as these have measureable
> overhead. We could have a feature "is a real PCI device",
> that's completely reasonable.

Do we use weaker barriers on the Linux driver side ? I didn't think so


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