linux-kernel - Re: next-20090206: deadlock on ext4

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Message-ID: <a4423d670902061004i424817e1vd699a61e335f010a@mail.gmail.com>
Date:	Fri, 6 Feb 2009 21:04:08 +0300
From:	Alexander Beregalov <a.beregalov@...il.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	linux-ext4@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: next-20090206: deadlock on ext4

2009/2/6 Eric Sandeen <sandeen@...hat.com>:
> Alexander Beregalov wrote:
>> Hi
>>
>> I run dbench on ext4 on loop device.
>>
>> EXT4-fs: barriers enabled
>> kjournald2 starting: pid 2420, dev loop0:8, commit interval 5 seconds
>> EXT4 FS on loop0, internal journal on loop0:8
>> EXT4-fs: delayed allocation enabled
>> EXT4-fs: file extents enabled
>> EXT4-fs: mballoc enabled
>> EXT4-fs: mounted filesystem loop0 with ordered data mode
>> JBD: barrier-based sync failed on loop0:8 - disabling barriers
>>
>> INFO: task pdflush:2339 blocked for more than 120 seconds.
>
> Looks a lot like a bug I filed:
>
> http://bugzilla.kernel.org/show_bug.cgi?id=12579
>
> but I'm having trouble reproducing it, now.  I'll try dbench!
Yes, I can reproduce it easy with dbench.
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