On 12 May 2015 at 09:10, Pavel Fedin <p.fe...@samsung.com> wrote: > This patch set introduces eventfd support for virio-mmio. It was originally > published by Ying-Shiuan Pan but never got it to upstream: > https://lists.gnu.org/archive/html/qemu-devel/2014-02/msg00715.html > I have updated and successfully tested it with vhost-net. I confirm that this > solution significantly improves the network performance even without irqfd. > I would like to upstream it, since virtio-mmio is still there. I know that > some of you consider it deprecated, however i believe this is not entirely > true. Because you can add it to machine models which are not supposed to > have PCI (like vexpress). > An old patch set relied on additional "eventfd" option in order to disable > the support if not implemented in kernel. My version simply checks > kvm_eventfds_enabled() for this purpose, so backwards compatibility is much > better. > I decided to leave this set in three parts because ioeventfd support should > be enabled only when both host and guest notifiers are in place. I believe > it will not work with partial implementation, at least because vhost-net > requires both sets of eventfds. In this version i added correct reset > handling.
Hi Pavel. I've been going through my to-review folder and found this series from back in May lurking in it. Sorry I never got to reviewing it. Do you think it's still a change worth having? If so, please can you rebase and resend and I'll look at it this time around. thanks -- PMM
