From: Jeff Layton <jlayton@primarydata.com>
Date: Fri, 25 Jul 2014 11:34:26 +0000 (-0400)
Subject: nfsd: give block_delegation and delegation_blocked its own spinlock
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~101^2~82
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f54fe962b88fbecd918feeb49b8838e272184c91;p=pandora-kernel.git

nfsd: give block_delegation and delegation_blocked its own spinlock

The state lock can be fairly heavily contended, and there's no reason
that nfs4_file lookups and delegation_blocked should be mutually
exclusive.  Let's give the new block_delegation code its own spinlock.
It does mean that we'll need to take a different lock in the delegation
break code, but that's not generally as critical to performance.

Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
---

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