From: Christoph Hellwig <hch@infradead.org>
Date: Tue, 6 Dec 2011 21:58:17 +0000 (+0000)
Subject: xfs: implement lazy removal for the dquot freelist
X-Git-Tag: v3.3-rc1~169^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=be7ffc38a80a78e6b68d0f51fae8e8d57b55324c;p=pandora-kernel.git

xfs: implement lazy removal for the dquot freelist

Do not remove dquots from the freelist when we grab a reference to them in
xfs_qm_dqlookup, but leave them on the freelist util scanning notices that
they have a reference.  This speeds up the lookup fastpath, and greatly
simplifies the lock ordering constraints.  Note that the same scheme is
used by the VFS inode and dentry caches.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
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