On 8/19/19 8:36 PM, Dave Chinner wrote:
On Mon, Aug 19, 2019 at 08:09:33PM -0700, John Hubbard wrote:
On 8/19/19 6:20 PM, Dave Chinner wrote:
On Mon, Aug 19, 2019 at 05:05:53PM -0700, John Hubbard wrote:
On 8/19/19 2:24 AM, Dave Chinner wrote:
On Mon, Aug 19, 2019 at 08:34:12AM +0200, Jan Kara wrote:
On Sat 17-08-19 12:26:03, Dave Chinner wrote:
On Fri, Aug 16, 2019 at 12:05:28PM -0700, Ira Weiny wrote:
On Thu, Aug 15, 2019 at 03:05:58PM +0200, Jan Kara wrote:
On Wed 14-08-19 11:08:49, Ira Weiny wrote:
On Wed, Aug 14, 2019 at 12:17:14PM +0200, Jan Kara wrote:
...
AFAIA, there is no struct file here - the memory that has been pinned
is just something mapped into the application's address space.
It seems to me that the socket here is equivalent of the RDMA handle
that that owns the hardware that pins the pages. Again, that RDMA
handle is not aware of waht the mapping represents, hence need to
hold a layout lease if it's a file mapping.
SO from the filesystem persepctive, there's no difference between
XDP or RDMA - if it's a FSDAX mapping then it is DMAing directly
into the filesystem's backing store and that will require use of
layout leases to perform safely.
OK, got it! Makes perfect sense.
thanks,
--
John Hubbard
NVIDIA
