On Sun, 23 Apr 2023 09:54:28 +0800 Xuan Zhuo wrote: > On Fri, 21 Apr 2023 06:50:59 -0700, Jakub Kicinski <kuba@xxxxxxxxxx> wrote: > > On Fri, 21 Apr 2023 15:31:04 +0800 Xuan Zhuo wrote: > > > I am not particularly familiar with dma-bufs. I want to know if this mechanism > > > can solve the problem of virtio-net. > > > > > > I saw this framework, allowing the driver do something inside the ops of > > > dma-bufs. > > > > > > If so, is it possible to propose a new patch based on dma-bufs? > > > > I haven't looked in detail, maybe Olek has? AFAIU you'd need to rework > > uAPI of XSK to allow user to pass in a dma-buf region rather than just > > a user VA. > > This seems to be a big job. Can we first receive this patch. To me it looks like a very obvious workaround for the fact that virtio does not make normal use of the DMA API, and (for reasons which perhaps due to my meager intellect I do not grasp) you are not allowed to fix that. Regardless, we have a path forward so I vote "no" to the patch under discussion.
