XFS deadlock the second

[Christoph Hellwig]

On Mon, Oct 24, 2011 at 01:47:25PM +0200, Stefan Priebe - Profihost AG wrote:
> Hi,
> 
> today i received another deadlock while running all your patches.
> 
> Output sysrq + w:
> http://pastebin.com/raw.php?i=YZGV6hxm

I just one process waiting for memory allocation in the networking code,
and two in XFS waiting for a page to be unlocked.  One during read, so
defintively waitin for I/O,  the other in write_begin so probably as
well.  If this didn't go away after a while it seems like a VM balancing
issue to me.

> 
> Stefan
> 
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