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Date: Tue, 17 Apr 2012 18:59:55 +0100
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "J. Bruce Fields" <bfields@fieldses.org>, linux-kernel@vger.kernel.org,
        linux-fsdevel@vger.kernel.org
Subject: Re: [git pull] vfs and fs fixes
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On Tue, Apr 17, 2012 at 09:33:06AM -0700, Linus Torvalds wrote:
> On Tue, Apr 17, 2012 at 9:22 AM, J. Bruce Fields <bfields@fieldses.org> wrote:

> In fact I don't think you need even that much. Just a simple
> 
>   touch a
>   ln a b
>   mv a b
> 
> looks like it should deadlock on itself, no? source and dest inodes
> will be the same, so the mutex_lock() will just deadlock without even
> any ABBA race.

No, this one will bail out much earlier.