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Date: Mon, 17 Dec 2001 19:04:52 -0200 (BRST)
From: Marcelo Tosatti <marcelo@conectiva.com.br>
To: David Gomez <davidge@jazzfree.com>
Cc: Linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Loopback deadlock again
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Get the backtrace of the loopback thread (using magic sysrq) and use
ksymoops to decode it using the System.map of your running kernel... 

Thanks

On Mon, 17 Dec 2001, David Gomez wrote:

> 
> Hi,
> 
> Even with the Andrea/Monchil patch applied against 2.4.17-rc1, i'm still
> hitting the loopback deadlock. Doing a 'cp -a' to a loop device leaves cp
> and the loop kernel thread in D state.
> 
> I don't know if it's useful, but i did a strace of cp, and the process is
> deadlocked in a mkdir call. Sometimes, a 'sync' finish the deadlock, other
> times sync also hangs:
> 
> [...]
> 589 tty1     S      0:00 bash
> 594 ?        DW<    0:00 [loop0]
> 620 tty1     D      0:00 sync
> 
> And a reboot is the only way to kill the tasks.
> 
> 
> Thanks
> 
> David G?mez
> 
> "The question of whether computers can think is just like the question of
>  whether submarines can swim." -- Edsger W. Dijkstra
> 
> 
> 
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