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Date: Mon, 09 Apr 2001 10:36:21 -0700
From: Andrew Morton <andrewm@uow.edu.au>
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To: "Eloy A. Paris" <eparis@andrew.cmu.edu>
CC: linux-kernel@vger.kernel.org
Subject: Re: Processes hanging in D state in 2.4.3 - any findings?
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"Eloy A. Paris" wrote:
> 
> Hi guys,
> 
> I have seen several messages posted to l-k about people reporting
> processes (mozilla most of the time) hanging in the D state in 2.4.3,
> but I haven't seen someone posting a possible explanation or solution
> to the problem.

It's due to problems in the rw_semaphore implementation.  These
were basically unused for a year, then a couple of weeks ago
we started using them, and the problems came to light.

> Anyone knows where does the problem lie, or a workaround for the
> problem? I hate going through the fsck that happens when umount fails
> because processes are in the D state...

I put out a patch yesterday which will fix the problem.  Discussions
are ongoing...

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