From owner-freebsd-hackers@FreeBSD.ORG  Thu Oct 25 10:29:59 2007
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From: Marc =?utf-8?q?L=C3=B6rner?= <marc.loerner@hob.de>
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Date: Thu, 25 Oct 2007 12:01:21 +0200
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Cc: Sergey Matveychuk <sem@FreeBSD.org>
Subject: Re: How to get a kthread ID?
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On Thursday 25 October 2007 11:02, Sergey Matveychuk wrote:
> Is there a possibility to get a kthread ID inside a kthread?
> Just like pthread_self(3).

In function kthread_exit there you see that you can obtain the 
thread-structure with curthread. 
And then in this thread-structure is the field td_tid.

HTH,
Marc