From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <1499c540356624db8d327cd95edaadef@plan9.bell-labs.com>
From: "Russ Cox" <rsc@plan9.bell-labs.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Weird problem.
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Date: Tue, 26 Feb 2002 18:37:13 -0500
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If you run acid -k, you can get a kernel stack trace
for the process doing the open.  That will tell you
what exactly is blocking.  p->debug is a QLock, and
unfortunately they don't keep track of who is currently
holding it.  The kernel trace might suggest where to
go next though.

grep /proc/ /proc/*/fd might be useful too.