linux-kernel - Re: kernel BUG at fs/btrfs/delayed-inode.c:1466!

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Message-ID: <4F595D6D.6080809@cn.fujitsu.com>
Date:	Fri, 09 Mar 2012 09:31:25 +0800
From:	Liu Bo <liubo2009@...fujitsu.com>
To:	Jacek Luczak <difrost.kernel@...il.com>
CC:	dave@...os.cz, linux-btrfs <linux-btrfs@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, josef@...hat.com
Subject: Re: kernel BUG at fs/btrfs/delayed-inode.c:1466!

On 03/09/2012 03:35 AM, Jacek Luczak wrote:
> 2012/3/8 David Sterba <dave@...os.cz>:
>> On Thu, Mar 08, 2012 at 01:10:45PM +0100, Jacek Luczak wrote:
>>> kernel BUG at fs/btrfs/delayed-inode.c:1466!
>> 1461         ret = btrfs_delayed_item_reserve_metadata(trans, root, item);
>> 1462         /*
>> 1463          * we have reserved enough space when we start a new transaction,
>> 1464          * so reserving metadata failure is impossible.
>> 1465          */
>> 1466         BUG_ON(ret);
>>
>>> RAX: 00000000ffffffe4
>> ENOSPC
>>
>>>  [<ffffffffa03210e5>] ? __btrfs_unlink_inode+0x172/0x25e [btrfs]
>>>  [<ffffffffa032158c>] ? btrfs_rename+0x38b/0x55b [btrfs]
>> rename reserves 20 blocks, but seems that's not enough.  I've never seen
>> a crash report in rename, and according to the stacktrace there's
>> nothing suspicious (like selinux related).
> 
> There were quite many things happening in the system at that time.
> Can't really tell what could trigger this.
> 
> Complete logs: http://91.234.146.107/~difrost/logs/tampere_log.gz
> 

Hi Jacek,

So are these warnings based on the latest upstream of btrfs?

thanks,
liubo

> -Jacek
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