linux-kernel - Re: [PATCH 3.10 27/31] deal with deadlock in d

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Date:	Mon, 27 Apr 2015 09:53:20 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Al Viro <viro@...iv.linux.org.uk>,
	hujianyang <hujianyang@...wei.com>
Subject: Re: [PATCH 3.10 27/31] deal with deadlock in d_walk()

On Mon, Apr 27, 2015 at 02:20:32AM +0100, Ben Hutchings wrote:
> On Sun, 2015-04-26 at 15:49 +0200, Greg Kroah-Hartman wrote:
> > 3.10-stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Al Viro <viro@...iv.linux.org.uk>
> > 
> > commit ca5358ef75fc69fee5322a38a340f5739d997c10 upstream.
> > 
> > ... by not hitting rename_retry for reasons other than rename having
> > happened.  In other words, do _not_ restart when finding that
> > between unlocking the child and locking the parent the former got
> > into __dentry_kill().  Skip the killed siblings instead...
> > 
> > Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> > Cc: Ben Hutchings <ben@...adent.org.uk>
> > [hujianyang: Backported to 3.10 refer to the work of Ben Hutchings in 3.2:
> >  - As we only have try_to_ascend() and not d_walk(), apply this
> >    change to all callers of try_to_ascend()
> >  - Adjust context to make __dentry_kill() apply to d_kill()]
> > Signed-off-by: hujianyang <hujianyang@...wei.com>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> This is broken; you need to fold in commit 20defcec264c from 3.2.y
> ("dcache: Fix locking bugs in backported "deal with deadlock in
> d_walk()"").

Thanks for letting me know, now applied.

greg k-h
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