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From:	"Dave Korn" <dave DOT korn AT artimi DOT com>
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Subject:	RE: postinstall hang
Date:	Tue, 1 Apr 2008 15:01:35 +0100
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Popper, Samuel (US SSA) wrote on 01 April 2008 14:47:

> > > $ NUM=1; while true ; do echo `echo $NUM` ; NUM=$(( $NUM + 1 )); done
> > > 
> > > Hangs pretty quickly,
> > 
> > because it forks a huge number of processes, and each fork is likely to
> > be tripped up by a BLODA
> 
> As I understand it, that should fork once per iteration.
> 
> Running with cut-down PATH:
> 
> [samuel DOT popper AT localhost ~]$ echo $PATH
> /usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin
> [samuel DOT popper AT localhost ~]$ NUM=1; while true ; do echo `echo $NUM` ;
> NUM=$(( $NUM + 1 )); done 1
> 2
> 
> Here, it hung after 2 iterations.  The default /etc/profile forks more
> than that! 

  FWIW, can't reproduce it here on XPSP2 with cygwin 1.5.23.

> Other than sneaking in via PATH, the only moderately intrusive thing
> running on the system is Sysinternal's ProcessExplorer.  But I tried
> running with that closed, and it made no difference.
> 
> Is there anything else that could contribute to BLODA?

  Yes, absolutely anything that hooks or injects into processes.  Try using
procexp to get a list of DLLs from the stuck bash processes, and let us know
what's there.


    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....


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