Re: [Qemu-devel] [PATCH V2] virtio-pci: reduce modern_mem_bar size

2016-09-07 Thread Marcel Apfelbaum
On 09/07/2016 06:05 PM, Michael S. Tsirkin wrote: On Wed, Sep 07, 2016 at 06:02:25PM +0300, Marcel Apfelbaum wrote: Currently each VQ Notification Virtio Capability is allocated on a different page. The idea is to enable split drivers within guests, however there are no known plans to do that. T

Re: [Qemu-devel] [PATCH V2] virtio-pci: reduce modern_mem_bar size

2016-09-07 Thread Michael S. Tsirkin
On Wed, Sep 07, 2016 at 06:02:25PM +0300, Marcel Apfelbaum wrote: > Currently each VQ Notification Virtio Capability is allocated > on a different page. The idea is to enable split drivers within > guests, however there are no known plans to do that. > The allocation will result in a 8MB BAR, more

[Qemu-devel] [PATCH V2] virtio-pci: reduce modern_mem_bar size

2016-09-07 Thread Marcel Apfelbaum
Currently each VQ Notification Virtio Capability is allocated on a different page. The idea is to enable split drivers within guests, however there are no known plans to do that. The allocation will result in a 8MB BAR, more than various guest firmwares pre-allocates for PCI Bridges hotplug process