linux-ext4 - Re: Panic with ext4,nbd,qemu-img,block

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Message-ID: <20180120234028.GB4451@thunk.org>
Date:   Sat, 20 Jan 2018 18:40:28 -0500
From:   Theodore Ts'o <tytso@....edu>
To:     "Hongzhi, Song" <hongzhi.song@...driver.com>
Cc:     linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org
Subject: Re: Panic with ext4,nbd,qemu-img,block

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").

						- Ted