From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kent Overstreet <kmo-PEzghdH756F8UrSeD/g0lQ@public.gmane.org>
Subject: Re: bcache hangs and calll trace
Date: Fri, 30 Aug 2013 14:18:07 -0700
Message-ID: <20130830211807.GB20307@kmo-pixel>
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To: Stefan Priebe <s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org>
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On Thu, Aug 29, 2013 at 07:15:15AM +0200, Stefan Priebe wrote:
> Hi,
> 
> i got this one today. I have a load aof 1200 after this.

It's not clear from the backtraces where it's getting stuck - can you
try the patch I just mailed out and see if that fixes it? The deadlock
that fixes it could be the cause here.