stable/10 r258317 - UFS lock problem

[Konstantin Belousov]

On Wed, Dec 11, 2013 at 11:50:14AM +0200, ?zkan KIRIK wrote:
> I tried disabling softupdates,
> 
> I doesnt lock, but write performance was very very pooor.
It is very hard to do anything with information in 200+ screenshots.

From the ps output, it seems that the UFS is waiting for the write
requests to drain, and this in fact never happens.  What is the
underlying device which carries the UFS volume ?
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