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Date: Tue, 14 Sep 2004 10:10:08 -0400 (EDT)
To: Julian Elischer <julian@elischer.org>
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cc: John Baldwin <jhb@freebsd.org>
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Subject: Re: Unkillable KSE threaded proc
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Julian Elischer writes:
 > Andrew Gallatin wrote:
 > > Julian Elischer writes:
 > >  > I think that this would possibly GO AWAY of you disab;ed preemption. 
 > >  > which would make it very hard to debug :-)
 > > 
 > > Nope, still happens w/o preempt..  And its the "worse" problem of deadlocking
 > > the system rather than just having the process fail to exit.
 > > 
 > > db> ps
 > >   pid   proc     uarea   uid  ppid  pgrp  flag   stat  wmesg    wchan  cmd
 > >   579 c37e41c0 e8855000 1387   578   579 0004002 [SLPQ ttyin 0xc17df810][SLP] csh
 > >   578 c1817540 e671a000 1387   576   576 0000100 [SLPQ select 0xc06cb704][SLP] sshd
 > >   576 c37e4540 e8857000    0   451   576 0000100 [SLPQ sbwait 0xc1983e84][SLP] sshd
 > >   566 c1a1fc40 e67ba000 1387     1   564 000c482 (threaded)  mx_pingpong
 > >    thread 0xc37944b0 ksegrp 0xc1a20460 [CPU 0]
 > >    thread 0xc3794640 ksegrp 0xc1a20460 [SUSP]
 > >    thread 0xc187e320 ksegrp 0xc1a20460 [RUNQ]
 > >    thread 0xc187e4b0 ksegrp 0xc187fee0 [CPU 1]
 > > 
 > 
 > [...]
 > 
 > can you reconfirm that this probelm exists without preemption with today's -current?
 > 

Yes, it seems to behave exactly the same way for a -current cvsupped
one hour ago.

Drew