From owner-freebsd-smp Sun Nov 8 11:20:24 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id LAA10105 for freebsd-smp-outgoing; Sun, 8 Nov 1998 11:20:24 -0800 (PST) (envelope-from owner-freebsd-smp@FreeBSD.ORG) Received: from dingo.cdrom.com (castles209.castles.com [208.214.165.209]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA10100 for ; Sun, 8 Nov 1998 11:20:22 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.9.1/8.8.8) with ESMTP id LAA03047; Sun, 8 Nov 1998 11:18:19 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Message-Id: <199811081918.LAA03047@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: "Brian C. Grayson" cc: freebsd-smp@FreeBSD.ORG Subject: Re: disk-wait problems/hangs In-reply-to: Your message of "Sat, 07 Nov 1998 23:36:40 CST." <19981107233640.A17996@marvin.ece.utexas.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sun, 08 Nov 1998 11:18:18 -0800 From: Mike Smith Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org The 'D' state isn't actually very useful; can you add 'l' to your ps args and report the WCHAN value? The latter makes it possible to narrow down where exactly things are waiting... > We're running 3.0-RELEASE on a few dual P-II boxes. > Occasionally, processes will start getting hung in 'D' > (disk-wait, IIRC), even on an otherwise-idle machine. They > never come out, they aren't kill -9'able. Once the system gets > into this state, commands like 'df' and 'ls' are likely to go into > disk-wait. Eventually (on the order of minutes/hours), > something crucial like nfsd, ypbind, or sshd gets stuck in D, > and the machine requires a reboot. > > I can reproducibly force the cascade of D problems by running > an a.out Netscape -- it gets hung after <2 CPU seconds, and > things go downhill quickly. But I believe the problems have > occurred before without the use of any a.out executables. > > Has anyone else seen this? > > Brian > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-smp" in the body of the message > -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message