linux-kernel - [PATCH v3 0/1] dcache: Translating dentry into pathname without taking rename

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Message-Id: <1378483738-10129-1-git-send-email-Waiman.Long@hp.com>
Date:	Fri,  6 Sep 2013 12:08:57 -0400
From:	Waiman Long <Waiman.Long@...com>
To:	Alexander Viro <viro@...iv.linux.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Waiman Long <Waiman.Long@...com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"Chandramouleeswaran, Aswin" <aswin@...com>,
	"Norton, Scott J" <scott.norton@...com>,
	George Spelvin <linux@...izon.com>,
	John Stoffel <john@...ffel.org>
Subject: [PATCH v3 0/1] dcache: Translating dentry into pathname without taking rename_lock

Change History

v2->v3:
 - Simplify prepend_name() to blindly copy the dname over until it
   reaches a null byte or the specified length leaving the sequence
   check to handle error case.

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 |  178 ++++++++++++++++++++++++++++++++++++++--------------------
 1 files changed, 116 insertions(+), 62 deletions(-)

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