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. > > Can we just disable RDMA to regular filesystems? Regular filesystems > should have full control of the write back and dirty status of their > pages.
That may be a solution to the corruption/crashes but it is not a solution which users want to see. RDMA directly to file systems (specifically DAX) is a use case we have seen customers ask for. I think this is the correct path toward supporting this use case. Ira
