From owner-freebsd-hackers Tue Jun 17 00:30:02 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id AAA29731 for hackers-outgoing; Tue, 17 Jun 1997 00:30:02 -0700 (PDT) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (8.8.5/8.8.5) with SMTP id AAA29685 for ; Tue, 17 Jun 1997 00:29:56 -0700 (PDT) Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id JAA00493; Tue, 17 Jun 1997 09:29:51 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.8.5/8.8.5) id OAA07459; Sun, 15 Jun 1997 14:46:11 +0200 (MET DST) Message-ID: <19970615144611.AD50958@uriah.heep.sax.de> 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 References: <339E0785.2781E494@whistle.com> X-Mailer: Mutt 0.60_p2-3,5,8-9 Mime-Version: 1.0 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <339E0785.2781E494@whistle.com>; from Julian Elischer on Jun 10, 1997 19:03:49 -0700 Sender: owner-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk 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. ;-)