Am 31.08.2012 19:59, schrieb Theodore Ts'o:

On Fri, Aug 31, 2012 at 11:28:59AM +0200, Jan Kara wrote:

quoted

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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