linux-kernel - Re: processes hung after sys_renameat, and 'missing' processes

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Date:	Wed, 6 Jun 2012 22:08:47 -0400
From:	Dave Jones <davej@...hat.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Miklos Szeredi <mszeredi@...e.cz>, Jan Kara <jack@...e.cz>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: processes hung after sys_renameat, and 'missing' processes

On Thu, Jun 07, 2012 at 02:54:10AM +0100, Al Viro wrote:

 > > Do you even need the "dentry->d_parent != dentry" test? When do we
 > > even rename root dentries?
 > 
 > Root of the filesystem - never; root of disconnected subtree - sure,
 > that's how they become connected to the tree.  See d_materialize_unique(),
 > for example...
 > 
 > BTW, I really need more coffee - those checks belong in __d_move(),
 > not d_move(); aforementioned d_materialize_unique() doesn't use d_move(),
 > it calls __d_move() directly.  Sorry.

np, I'll restart the build/test.

	Dave

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