linux-kernel - Re: [vfs] WARNING: CPU: 0 PID: 3 at fs/dcache.c:255 __d

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Date:	Mon, 3 Nov 2014 07:17:11 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	LKP <lkp@...org>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [vfs] WARNING: CPU: 0 PID: 3 at fs/dcache.c:255 __d_free()

On Mon, Nov 03, 2014 at 03:01:42PM +0800, Fengguang Wu wrote:
> Hi Al,
> 
> 0day kernel testing robot got the below dmesg and the first bad commit is
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-next
> 
> commit ff1995cbc0eb7c4beeca313a150111e3e3622e2c
> Author:     Al Viro <viro@...iv.linux.org.uk>
> AuthorDate: Sun Oct 26 19:19:16 2014 -0400
> Commit:     Al Viro <viro@...iv.linux.org.uk>
> CommitDate: Fri Oct 31 13:04:16 2014 -0400
> 

Right, but the warning is a false positive - both of these WARN_ON should
be moved to dentry_free() (both the __d_free() and __d_free_external() ones,
that is).  Will fix and push tomorrow morning...
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