The following reply was made to PR kern/35932; it has been noted by GNATS.

From: Andrew Doran <ad@netbsd.org>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: PR/35932 CVS commit: src/sys
Date: Wed, 21 Mar 2007 18:26:01 +0000 (UTC)

 Module Name:	src
 Committed By:	ad
 Date:		Wed Mar 21 18:26:00 UTC 2007
 
 Modified Files:
 	src/sys/kern: kern_exit.c kern_lwp.c sys_lwp.c
 	src/sys/sys: lwp.h
 
 Log Message:
 Improvements to lwp_wait1(), for PR kern/35932:
 
 - Better detect simple cycles of threads calling _lwp_wait and return
   EDEADLK. Does not handle deeper cycles like t1 -> t2 -> t3 -> t1.
 - If there are multiple threads in _lwp_wait, then make sure that
   targeted waits take precedence over waits for any LWP to exit.
 - When checking for deadlock, also count the number of zombies currently
   in the process as potentially reapable. Whenever a zombie is murdered,
   kick all waiters to make them check again for deadlock.
 - Add more comments.
 
 Also, while here:
 
 - LOCK_ASSERT -> KASSERT in some places
 - lwp_free: change boolean arguments to type 'bool'.
 - proc_free: let lwp_free spin waiting for the last LWP to exit, there's
   no reason to do it here.
 
 
 To generate a diff of this commit:
 cvs rdiff -r1.171 -r1.172 src/sys/kern/kern_exit.c
 cvs rdiff -r1.62 -r1.63 src/sys/kern/kern_lwp.c
 cvs rdiff -r1.16 -r1.17 src/sys/kern/sys_lwp.c
 cvs rdiff -r1.56 -r1.57 src/sys/sys/lwp.h
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.