linux-kernel - Re: stuck process in D state

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Message-Id: <1249393399.7924.213.camel@twins>
Date:	Tue, 04 Aug 2009 15:43:19 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Arnd Hannemann <hannemann@...s.rwth-aachen.de>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: stuck process in D state

On Tue, 2009-08-04 at 15:30 +0200, Arnd Hannemann wrote:
> Hi,
> 
> I have a process in D state on one of our servers. How can I get it killed?
> Seems to be hanging on nfs (but nfs server is up and running).
> Other processes have no problems accessing files on same nfs mount.

You can't, that's what D state means - TASK_UNINTERRUPTIBLE, the only
way it can continue is to make that page its waiting on available.

I seem to remember some people are slowly converting most of those
wait_on_page stuff to interruptible waits, but that's a slow and tricky
business.
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