On Mon, Feb 04, 2019 at 05:14:19PM +0000, Christopher Lameter wrote: > Frankly I still think this does not solve anything. > > Concurrent write access from two sources to a single page is simply wrong. > You cannot make this right by allowing long term RDMA pins in a filesystem > and thus the filesystem can never update part of its files on disk. Fundamentally this patch series is fixing O_DIRECT to not crash the kernel in extreme cases.. RDMA has the same problem, but it is much easier to hit. I think questions related to RDMA are somewhat separate, and maybe it should be blocked, or not, but either way O_DIRECT has to be fixed. Jason
