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Date:      Sun, 15 Jun 1997 14:46:11 +0200
From:      j@uriah.heep.sax.de (J Wunsch)
To:        hackers@FreeBSD.ORG
Cc:        julian@whistle.com (Julian Elischer)
Subject:   Re: BSD2.2 (a while ago) and ppwait state
Message-ID:  <19970615144611.AD50958@uriah.heep.sax.de>
In-Reply-To: <339E0785.2781E494@whistle.com>; from Julian Elischer on Jun 10, 1997 19:03:49 -0700
References:  <339E0785.2781E494@whistle.com>

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As Julian Elischer wrote:

> Does anyone know why we are seeing this on a machine
> with kernels several months old?
> I don't remember discussion of this..
> 
> basically, processes start freezing (after 6 hours)
> in 'ppwait' state, which appears to be related to vfork.

John's vfork optimization caused a hang in libc's (buggy) popen(3)
implementation.  Look into the CVS history of src/lib/libc/gen/popen.c,
or bring your sys/kern/kern_fork.c to rev. 1.38 (supposedly).

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



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