[RFC] virtio: use mandatory barriers for remote processor vdevs
From: mst@redhat.com (Michael S. Tsirkin)
Date: 2011-12-01 09:07:49
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kvm, lkml, virtualization
On Thu, Dec 01, 2011 at 08:14:26AM +0200, Ohad Ben-Cohen wrote:
On Thu, Dec 1, 2011 at 1:13 AM, Michael S. Tsirkin [off-list ref] wrote:quoted
For x86, stores into memory are ordered. So I think that yes, smp_XXX can be selected at compile time.But then you can't use the same kernel image for both scenarios.
I was talking about virtio-pci. That always allocates the ring in the normal memory.
It won't take long until people will use virtio on ARM for both virtualization and for talking to devices, and having to rebuild the kernel for different use cases is nasty.
Yes, I understand that it's nasty.
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