Re: kern/46402 (LWPs created after exit_lwp() is called can hang the process...)

[Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>]

Greg Oster <oster%cs.usask.ca@localhost> wrote:
>  > Synopsis: LWPs created after exit_lwp() is called can hang the
>  > process...
>  > 
>  > State-Changed-From-To: analyzed->feedback
>  > State-Changed-By: rmind%NetBSD.org@localhost
>  > State-Changed-When: Wed, 19 Sep 2012 21:23:06 +0000
>  > State-Changed-Why:
>  > Can you please try the following patch?
>  > 
>  > http://www.netbsd.org/~rmind/lwp_wait_fix.diff
>  > 
>  
>  After 376883 iterations on the test loop thing hung:
>  
>  USER      PID %CPU %MEM    VSZ   RSS TTY     STAT STARTED    TIME
>  COMMAND UID   PID  PPID   CPU PRI NI    VSZ   RSS WCHAN    STAT
>  TTY        TIME COMMAND
>  root    27779  0.0  0.1 798304  1396 ttyp0   DEl+  2:19AM 0:00.01
>  (t_cond   0 27779   410 93985  63  0 798304  1396 -        DEl+ ttyp0
>  0:00.01 (t_cond) root    27779  0.0  0.1 798304  1396 ttyp0   DEl+
>  2:19AM 0:00.01 (t_cond   0 27779   410 93985  95  0 798304  1396
>  lwpwait  DEl+ ttyp0 0:00.01 (t_cond)
>  
>  (sorry for the cut'n'paste mess... weekend plans have changed, and I
>  have to run.. I can attempt to test more over the next days...)

Thanks.  No hurry. :)  Perhaps you could get the output of ps from crash(8)
or DDB?  Also, contents of struct proc of that process might be useful.

-- 
Mindaugas