linux-kernel - Re: [OOPS 2.6.21-rc7-mm1] kernel BUG at fs/sysfs/inode.c:272 (sysfs_drop

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Date:	Wed, 25 Apr 2007 02:51:43 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Vincent Vanackere <vincent.vanackere@...il.com>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>
Subject: Re: [OOPS 2.6.21-rc7-mm1] kernel BUG at fs/sysfs/inode.c:272 (sysfs_drop_dentry)

Andrew Morton wrote:
> On Wed, 25 Apr 2007 01:33:59 +0900 Tejun Heo <htejun@...il.com> wrote:
> 
>> Vincent Vanackere wrote:
>>> Hi,
>>>
>>> I'm getting the following oops at boot with the latest -mm kernel :
>>> ---------------------------------------------------------------
>>> kernel BUG at fs/sysfs/inode.c:272
>> Known problem.  Working on it.  Thanks.
>>
> 
> If it had been known by me I wouldn't have released known-buggy code to
> people who need to be able to test other people's code too. (argh)
> 

It's the problem Cornelia reported in the thread the patch was posted.
Okay, somehow it's missing lkml on cc list.  I included everybody
related but missed lkml.  A lot of screw ups lately.  My apologies.
Currently, known problems are...

1. new sysfs_drop_dentry() not allowing drop of parent when it's not
empty.  Reported by Cornelia and this thread reports the same problem.
I'm working on it now.

2. using sysfs_dirent pointer as sysfs inode number doesn't work because
ino_t is smaller than ulong on some archs.  It's also broken for 32bit
apps on 64bit archs.  Updated patch just submitted for review.

3. Sysfs rename doesn't work.  I broke it during the first series of
sysfs updates.  Will fix in a few days.

Again, sorry for all the troubles.  I'll be more careful.

-- 
tejun
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