tree 0647504caf067e89f419f83573c40bf2671a0a1c
parent 5ebe6afaf0057ac3eaeb98defd5456894b446d22
author Christoph Hellwig <hch@lst.de> 1430139013 +0200
committer J. Bruce Fields <bfields@redhat.com> 1430755357 -0400

nfsd/blocklayout: pretend we can send deviceid notifications

Commit df52699e4fcef ("NFSv4.1: Don't cache deviceids that have no
notifications") causes the Linux NFS client to stop caching deviceid's
unless a server pretends to support deviceid notifications.  While this
behavior is stupid and the language around this area in rfc5661 is a
mess carified by an errata that I submittted, Trond insists on this
behavior.  Not caching deviceids degrades block layout performance
massively as a GETDEVICEINFO is fairly expensive.

So add this hack to make the Linux client happy again.

Cc: stable@vger.kernel.org
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>