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530ea42192
Helen Chao <helen.chao@oracle.com> noticed that when a user traverses a referral on an NFS/RDMA mount, the resulting submount always uses TCP. This behavior does not match the vers= setting when traversing a referral (vers=4.1 is preserved). It also does not match the behavior of crossing from the pseudofs into a real filesystem (proto=rdma is preserved in that case). The Linux NFS client does not currently support the fs_locations_info attribute. The situation is similar for all NFSv4 servers I know of. Therefore until the community has broad support for fs_locations_info, when following a referral: - First try to connect with RPC-over-RDMA. This will fail quickly if the client has no RDMA-capable interfaces. - If connecting with RPC-over-RDMA fails, or the RPC-over-RDMA transport is not available, use TCP. Reported-by: Helen Chao <helen.chao@oracle.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.