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From: Andrew Gallatin <gallatin@cs.duke.edu>
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Date: Wed, 29 Sep 2004 16:13:46 -0400 (EDT)
To: Julian Elischer <julian@elischer.org>
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cc: David Xu <davidxu@freebsd.org>
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Subject: Re: easy to reproduce unkillable threads
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Julian Elischer writes:
 > 
 > 
 > Andrew Gallatin wrote:
 > 
 > >David Xu writes:
 > >
 > > > Please tell me easiest way to reproduce it, I tried best to reproduce 
 > > > it, but still got nothing.
 > > > 
 > > > >> http://people.freebsd.org/~gallatin/threadlock.tgz
 > > > >>
 > > > I use this test case.
 > >
 > >Are you on an SMP?  Do you use an 'ssh $HOST skill -u $USER -9' to
 > >send the signal?
 > >
 > >Julian, you can reproduce it, right?
 > >
 > 
 > not yet..
 > 
 > am setting up a SMP test machine to try again..

So far I've only had a chance to test under RELENG_5.
Maybe some change you made recently fixed it..

Drew