On Wed, Jun 12, 2019 at 06:14:46PM -0700, Dan Williams wrote: > > Effectively, we would need a way for an admin to close a specific file > > descriptor (or set of fds) which point to that file. AFAIK there is no way to > > do that at all, is there? > > Even if there were that gets back to my other question, does RDMA > teardown happen at close(fd), or at final fput() of the 'struct > file'? AFAIK there is no kernel side driver hook for close(fd). rdma uses a normal chardev so it's lifetime is linked to the file_ops release, which is called on last fput. So all the mmaps, all the dups, everything must go before it releases its resources. Jason
