From: Andi Kleen <ak@suse.de>
To: David Chinner <dgc@sgi.com>
Subject: Re: RFC - how to balance Dirty+Writeback in the face of slow  writeback.
Date: Mon, 21 Aug 2006 09:47:03 +0200
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Cc: Neil Brown <neilb@suse.de>, Jens Axboe <axboe@suse.de>,
       linux-kernel@vger.kernel.org, akpm@osdl.org
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> > Ouch.  
> > I suspect we are going to see more of this, as USB drive for backups
> > is probably a very attractive option for many.
> 
> I can't see how this would occur on a 2.6 kernel 

I still got the traces to prove it:
http://www.firstfloor.org/~andi/usb-loop-copy-stall-1

e.g. notice the lynx which is stuck in a m/atime update. It was stalling
for a quite long time.

> 
-Andi
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