dcache: Translating dentry into pathname without taking rename

From:		Waiman Long <Waiman.Long@hp.com>
To:		Alexander Viro <viro@zeniv.linux.org.uk>, Linus Torvalds <torvalds@linux-foundation.org>
Subject:		[PATCH v2 0/1] dcache: Translating dentry into pathname without taking rename_lock
Date:		Thu, 5 Sep 2013 14:55:15 -0400
Message-ID:		<1378407316-59852-1-git-send-email-Waiman.Long@hp.com>
Cc:		Waiman Long <Waiman.Long@hp.com>, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Chandramouleeswaran, Aswin" <aswin@hp.com>, "Norton, Scott J" <scott.norton@hp.com>, George Spelvin <linux@horizon.com>, John Stoffel <john@stoffel.org>
Archive-link:		Article, Thread

Change History

v1->v2:
 - Check for internal vs external dname, taking d_lock only for
   external dname for safety.
 - Replace memchr() by a byte-by-byte checking for loop.
 - Try lockless dentry to pathname conversion 3 times before falling
   back to taking the rename_lock to prevent live-lock.
 - Make code re-factoring suggested by George Spelvin.

Waiman Long (1):
  dcache: Translating dentry into pathname without taking rename_lock

 fs/dcache.c |  213 ++++++++++++++++++++++++++++++++++++++++++-----------------
 1 files changed, 151 insertions(+), 62 deletions(-)

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