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Date:	Sat, 01 Sep 2012 10:41:29 +0200
From:	Stefan Priebe <s.priebe@...fihost.ag>
To:	Theodore Ts'o <tytso@....edu>
CC:	Jan Kara <jack@...e.cz>, stable@...r.kernel.org,
	Greg KH <gregkh@...uxfoundation.org>, adilger.kernel@...ger.ca,
	linux-ext4@...r.kernel.org
Subject: Re: ext4 hung tasks in linux-stable 3.0.41

Am 31.08.2012 19:59, schrieb Theodore Ts'o:
> On Fri, Aug 31, 2012 at 11:28:59AM +0200, Jan Kara wrote:
>>>
>>> Is this problem known? Or is there a fix for 3.0.X available?
>>    From a quick look, processes are waiting for IO so it may be that your
>> disk is just loaded... Did it start happening after some change? Or do you
>> experience unexpectedly low performance?
>
> All of the processes waiting for I/O are waiting for a directory
> block.  This makes me suspicious that perhaps an interrupt or I/O
> request got lost.
>
> Is this a repeatable failure, and is the stack traces always the same?
>
> If so, you might want to try running badblocks on the device and make
> sure that hardware issues have been ruled out.

But but SMART is OK and i see no I/O errors from AHCI. But i'll try to 
replace the disk and see if this fixes it.

Stefan
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