From: Jan Kara <jack@suse.cz>
To: Theodore Ts'o <tytso@mit.edu>
Cc: "Hongzhi, Song" <hongzhi.song@windriver.com>,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org
Subject: Re: Panic with ext4,nbd,qemu-img,block
Date: Thu, 25 Jan 2018 10:26:59 +0100 [thread overview]
Message-ID: <20180125092659.wi2bj3gvv6ezmiuj@quack2.suse.cz> (raw)
In-Reply-To: <20180120234028.GB4451@thunk.org>
On Sat 20-01-18 18:40:28, Theodore Ts'o wrote:
> On Sat, Jan 20, 2018 at 04:41:00PM +0800, Hongzhi, Song wrote:
> >
> > 329.11 EXT4-fs (nbd0): mounted filesystem with ordered data mode. Opts:
> > (null)
> > 329.12 block nbd0: Connection timed out
> > 329.13 block nbd0: shutting down sockets
>
> That's your problem. I'm guessing qemu-nbd is dying for some reason,
> which is causing the nbd device to fail (hence the "connection timed
> out").
All those filesystem errors are obviously his problem but:
329.45 ------------[ cut here ]------------
329.46 kernel BUG at /kernel-source//fs/buffer.c:3091!
329.47 invalid opcode: 0000 [#1] PREEMPT SMP
...
is a kernel problem. Hongzhi, can you please track down which line in
submit_bh_wbc() is line 3091 in your sources? I'd be interested in which
assertion actually failed. My best bets would be on
BUG_ON(!buffer_mapped(bh));
but I'm not sure...
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
prev parent reply other threads:[~2018-01-25 9:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-20 8:41 Panic with ext4,nbd,qemu-img,block Hongzhi, Song
2018-01-20 23:40 ` Theodore Ts'o
2018-01-25 9:26 ` Jan Kara [this message]
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