From: Jeff Layton <jlayton@primarydata.com>
Date: Fri, 12 Sep 2014 20:40:21 +0000 (-0400)
Subject: nfsd: set and test NFSD4_CLIENT_STABLE bit to reduce nfsdcltrack upcalls
X-Git-Tag: fixes-for-v3.18-merge-window~9^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=788a7914ad43380d31efed1c4d14b5f2c466a764;p=pandora-kernel.git

nfsd: set and test NFSD4_CLIENT_STABLE bit to reduce nfsdcltrack upcalls

The nfsdcltrack upcall doesn't utilize the NFSD4_CLIENT_STABLE flag,
which basically results in an upcall every time we call into the client
tracking ops.

Change it to set this bit on a successful "check" or "create" request,
and clear it on a "remove" request.  Also, check to see if that bit is
set before upcalling on a "check" or "remove" request, and skip
upcalling appropriately, depending on its state.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
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