On Thu, Jan 25, 2018 at 09:08:48AM -0700, Jason Gunthorpe wrote: > On Wed, Jan 24, 2018 at 11:02:16PM -0800, Dan Williams wrote: > > > No, in 3 dimensions since there is a need to support non-ODP RDMA > > hardware, hypervisors want to coordinate DMA for guests, and non-RDMA > > hardware also pins memory indefinitely like V4L2. So it's bigger than > > RDMA, but that will likely be the first consumer of this 'longterm > > pin' mechanism. > > BTW, did you look at VFIO? I think it should also have this problem > right? VFIO seems to have the same issue. In practice I don't think people use file system backed pages for vfio, so it's not as urgent. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
