linux-kernel - Re: [RFC][PATCH] Fix hang in posix_locks

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Message-ID: <20071102150556.GB20594@mvista.com>
Date:	Fri, 2 Nov 2007 11:05:56 -0400
From:	"George G. Davis" <gdavis@...sta.com>
To:	"J. Bruce Fields" <bfields@...ldses.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] Fix hang in posix_locks_deadlock()

On Fri, Oct 26, 2007 at 01:07:50PM -0400, J. Bruce Fields wrote:
> 
> It may take multiple steps to identify a deadlock.  With the above
> you'll miss deadlocks like
> 
> 	process 1 is requesting a lock held by process 2
> 	process 2 is blocking on a lock held by process 3
> 	process 3 is blocking on a lock held by process 1.
> 
> Could you give more details about how you're causing
> posix_locks_deadlock to hang?  Is there a simple test-case you can post?

Sorry I missed your message due to procmail filters and failure to
read linux-kernel for a week.  : )

A bit late now since you've appliead a workaround but FWIW the test
case was posted as a followup to my initial post.

--
Regards,
George
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